1. Anderson J, Wirz-Justice A. Biological rhythms in the pathophysiology and treatment of affective disorders. In: Horton R, Katona C, eds. Biological aspects of affective disorders. London: Academic Press; 1991:223–269.

2. Beersma DGM, Reinink E, Gordijn MCM, Bouhuys AL, Van den Hoofdakker RH. Concepts in circadian rhythm research in relation to diurnal variations in depressed mood. In: Westenberg HGM, ed. Stress, biological rhythms and psychiatric disorders. Houten: Medidact; 1991:63–69.

3. Benca RM, Obermeyer WH, Thisted RA, Gillin JC. Sleep and psychiatric disorders: a meta-analysis. Arch Gen Psychiatry 1992;49:651–668.

4. Berger M, Riemann D. REM sleep in depression—an overview. J Sleep Res 1993;2:211–223.

5. Borbély AA, Wirz-Justice A. Sleep, sleep deprivation and depression. A hypothesis derived from a model of sleep regulation. Hum Neurobiol 1982;1:205–210.

6. Boulos Z, Terman M. Food availability and daily biological rhythms. Neurosci Biobehav Rev 1980;4:119–131.

7. Campbell SS. Alerting/activating effects of light. ASDA/SLTBR Task Force on the Use of Light Therapy for Sleep Disorders. LTBR Bull 1993;6:19–21.

8. Campbell SS. Treatment stategies for age-related disturbance using timed exposure to bright light. ASDA/SLTBR Task Force on the Use of Light Therapy for Sleep Disorders. LTBR Bull 1993;6:9–12.

9. Caroff SN, Winokur A. Hormonal response to thyrotropin-releasing hormone following rest–activity reversal in normal men. Biol Psychiatry 1984;19:1015–1025.

10. Checkley S. The relationship between biological rhythms and the affective disorders. In: Arendt J, Minors DS, Waterhouse JM, eds. Biological rhythms in clinical practice. London: Butterworth; 1989:160–183.

11. Czeisler CA, Kronauer RE, Allan JS, et al. Bright light induction of strong (type O) resetting of the human circadian pacemaker. Science 1989;244:1328–1333.

12. Dahl K, Avery DH, Lewy AJ, et al. Dim light melatonin onset and circadian temperature during a constant routine in hypersomnic winter depression. Acta Psychiatr Scand 1993;88:60–66.

13. Daimon K, Yamada N, Tsujimoto T, Takahashi S. Circadian rhythm abnormalities of deep body temperature in depressive disorders. J Affect Dis 1992;26:191–198.

14. Deacon S, Arendt J. Posture influences melatonin concentrations in plasma and saliva in humans. Neurosci Lett 1994;167:191–194.

15. Dijk D-J. Effects of light on circadian rhythms and sleep: basic processes. ASDA/SLTBR Task Force on the Use of Light Therapy for Sleep Disorders. LTBR Bull 1994;6:35–64.

16. Dirlich G, Kammerloher A, Schulz H, Lund R, Doerr P, von Zerssen D. Temporal coordination of rest–activity cycle, body temperature, urinary free cortisol, and mood in a patient with 48-hr unipolar depressive cycles in clinical and time-cue-free environments. Biol Psychiatry 1981;16:163–179.

17. Ehlers CL, Frank E, Kupfer DJ. Social zeitgebers and biological rhythms: a unified approach to understanding the etiology of depression. Arch Gen Psychiatry 1988;45:948–952.

18. Halberg F. Physiologic considerations underlying rhythmometry with special reference to emotional illness. In: de Ajuriaguerra J, ed. Cycles Biologiques et Psychiatrie. Paris: Masson et Cie, 1968;73–126.

19. Hall Jr. DP, Sing HC, Romanoski AJ. Identification and characterization of greater mood variance in depression. Am J Psychiatry 1991;148:418–419.

20. Hallonquist JD, Goldberg MA, Brandes JS. Affective disorders and circadian rhythms. Can J Psychiatry 1986;31:259–272.

21. Haug H-J, Wirz-Justice A. Diurnal variation of mood in depression: important or irrelevant? Biol Psychiatry 1993;34:201–203.

22. Healy D, Minors DS, Waterhouse JM. Shiftwork, helplessness and depression. J Affect Dis 1993;29:17–25.

23. Illnerová H, Vanecek J, Hoffmann K. Different mechanisms of phase delays and phase advances of the circadian rhythm in rat pineal N-acetyltransferase activity. J Biol Rhythms 1989;4:187–200.

24. Jauhar P, Weller MPI. Psychiatric morbidity and time zone changes. Br J Psychiatry 1982;140:231–235.

25. Klein DC, Moore RY, Reppert SM, eds. Suprachiasmatic nucleus: the mind's clock. New York: Oxford University Press; 1991.

26. Köhler WK, Fey P, Schmidt KP, Pflug B. Zeitgeber und das circadiane System bei depressiven Patienten. In: Baumann P, ed. Biologische Psychiatrie der Gegenwart. Vienna: Springer-Verlag; 1993: 233–237.

27. Kräuchi K, Wirz-Justice A. Seasonal patterns of nutrient intake in relation to mood. In: Anderson GH, Kennedy SH, eds. The biology of feast and famine: relevance to eating disorders. Orlando: Academic Press; 1992:157–182.

28. Krauss SS, Depue RA, Arbisi PA, Spoont M. Behavioral engagement level, variability, and diurnal rhythm as a function of bright light in bipolar II seasonal affective disorder: an exploratory study. Psychiatry Res 1992;43:147–160.

29. Kripke DF. Photoperiodic mechanisms for depression and its treatment. In: Perris C, Struwe G, Jansson B, eds. Biological psychiatry 1981. Amsterdam: Elsevier/North-Holland Biomedical Press; 1981:1249–1252.

30. Kripke DF. Critical interval hypotheses for depression. Chronobiology Int 1984;1:73–80.

31. Kripke DF, Mullaney DJ, Atkinson M, Wolf SR. Circadian rhythm disorders in manic–depressives. Biol Psychiatry 1978;13:335–351.

32. Kuhs H, Tölle R. Sleep deprivation therapy. Biol Psychiatry 1991;29:1129–1148.

33. Lacoste V, Wirz-Justice A. Seasonal variation in normal subjects: an update of variables current in depression research. In: Rosenthal NE, Blehar MC, eds. Seasonal affective disorders and phototherapy. New York: Guilford Press; 1989:167–229.

34. Leibenluft E, Wehr TA. Is sleep deprivation useful in the treatment of depression? Am J Psychiatry 1992;149:159–168.

35. Lewy AJ, Sack RL, Miller LS, et al. The use of plasma melatonin levels and light in the assessment and treatment of chronobiologic sleep and mood disorders. J Neural Transm 1986;Suppl. 21:279–289.

36. Lewy AJ, Saeeduddin A, Latham Jackson JM, Sack RL. Melatonin shifts human circadian rhythms according to a phase response curve. Chronobiol Int 1992;9:380–392.

37. Lewy AJ, Wehr TA, Goodwin FK, Newsome DA, Rosenthal NE. Manic–depressive patients may be supersensitive to light. Lancet 1981;1:383–384.

38. Linkowski P, Van Onderbergen A, Kerkhofs M, Bosson D, Mendlewicz J, Van Cauter E. A twin study of the 24-hour cortisol profile: evidence for genetic control of the human circadian clock. Am J Physiol 1993;264:E173–E181.

39. Minors D, Waterhouse JM, Wirz-Justice A. A human phaseresponse curve to light. Neurosci Lett 1991;133:36–40.

40. Mizukawa R, Ishiguro S, Takada H, Kishimoto A, Ogura C, Hazama H. Long-term observation of a manic–depressive patient with rapid cycles. Biol Psychiatry 1991;29:671–678.

41. Monk TH, Kupfer DJ, Frank E, Ritenour AM. The social rhythm metric (SRM): measuring daily social rhythms over 12 weeks. Psychiatry Res 1991;36:195–207.

42. Mrosovsky N, Reebs SG, Honrado GI, Salmon PA. Behavioral entrainment of circadian rhythms. Experientia 1989;45:696–702.

43. Okawa M, Mishima K, Hishikawa Y, Hozumi S, Hori H. Sleep disorder in elderly patients with dementia and trials of new treatments—enforcement of social interaction and bright light therapy. In: Kuman VM, Mallick HN, Nayar U, eds. Sleep-wakefulness. New Delhi: Wiley Eastern; 1993:128–132.

44. Papoušek M. Chronobiologische Aspekte der Zyklothymie. Fortschr Neurol Psychiat 1975;43:381–440.

45. Parry BL, Berga SL, Kripke DF, et al. Altered waveform of plasma nocturnal melatonin secretion in premenstrual depression. Arch Gen Psychiatry 1990;47:1139–1146.

46. Pflug B, Johnsson A, Martin W. Alterations in the circadian temperature rhythms in depressed patients. In: Wehr TA, Goodwin FK, eds. Circadian rhythms in psychiatry. Pacific Grove, CA: Boxwood Press; 1983:71–76.

47. Prigerson HG, Reynolds III CF, Frank E, Kupfer DJ, George CJ, Houck PR. Stressful life events, social rhythms, and depressive symptoms among the elderly: an examination of hypothesized causal linkages. Psychiatry Res 1994;51:33–49.

48. Remé C, Wirz-Justice A, Terman M. The visual input stage of the mammalian circadian pacemaking system: I. Is there a clock in the mammalian eye? J Biol Rhythms 1991;6:5–29.

49. Richter CP. Biological clocks in medicine and psychiatry. Springfield, IL: Charles C Thomas; 1965.

50. Rockwell DA, Winget CM, Rosenblatt LS, Higgins EA, Hetherington NW. Biological aspects of suicide: circadian disorganisation. J Nerv Ment Dis 1978;166:851–858.

51. Rosenthal NE, Blehar MC, eds. Seasonal affective disorder and phototherapy. New York: Guilford Press; 1989.

52. Rosenwasser AM. Circadian rhythms and depression: animal models? LTBR Bull 1992;4:35–39.

53. Sack DA, Rosenthal NE, Parry BL, Wehr TA. Biological rhythms in psychiatry. In: Meltzer HY, ed. Psychopharmacology: the third generation of progress. New York: Raven Press; 1987:669–685.

54. Sack RL, Lewy AJ, Blood ML, Keith D, Nakagawa H. Circadian rhythm abnormalities in totally blind people: incidence and clinical significance. J Clin Endocrinol Metab 1992;75:127–134.

55. Schmidt KP, Köhler WK, Fleissner G, Pflug B. Locomotor activity accelerates the adjustment of the temperature rhythm in shiftwork. J Interdisc Cycle Res 1990;21:243–245.

56. Schulte W. Zum Problem der Provokation und Kupierung von melancholischen Phasen. Arch Neurol Neurochir Psychiatr 1971;109: 427–435.

57. Siever LJ, Davis KL. Overview: toward a dysregulation hypothesis of depression. Am J Psychiatry 1985;142:1017–1031.

58. Souêtre E, Salvati E, Belugou J-L et al. Circadian rhythms in depression and recovery: evidence for blunted amplitude as the main chronobiological abnormality. Psychiatry Res 1989;28:263–278.

59. Surridge-David M, MacLean AW, Coulter ME, Knowles JB. Mood change following an acute delay of sleep. Psychiatry Res 1987;22:149–158.

60. Szuba MP, Yager A, Guze BH, Allen EM, Baxter LR. Disruption of social circadian rhythms in major depression: a preliminary report. Psychiatry Res 1992;42:221–230.

61. Taillard J, Sanchez P, Lemoine P, Mouret J. Heart rate circadian rhythm as a biological marker of desynchronization in major depression: a methodological and preliminary report. Chronobiology Int 1990;7:305–316.

62. Terman M, Terman JS. Seasonal affective disorder and light therapy: Report to the Depression Guidelines Panel, Public Health Service Agency for Health Care Policy and Research. New York: New York State Psychiatric Institute: 1991.

63. Tsujimoto T, Yamada N, Shimoda K, Hanada K, Takahashi S. Circadian rhythms in depression. Part II: Circadian rhythms in inpatients with various mental disorders. J Affect Dis 1990;18:199–210.

64. Van Cauter E, Sturis J, Byrne MM, et al. Preliminary studies on the immediate phase-shifting effects of light and exercise on the human circadian clock. In: Rusak B, Haddad G, eds. J Biol Rhythms. New York: Guilford Press; 1993:S99–S108.

65. Van den Hoofdakker RH, Beersma DGM. On the contribution of sleep wake physiology to the explanation and treatment of depression. Acta Psych Scand (Suppl) 1988;341:53–71.

66. von Zerssen D, Barthelms H, Dirlich G, et al. Circadian rhythms in endogenous depression. Psychiatry Res 1985;16:51–63.

67. Wehr TA, Goodwin FK. Biological rhythms in manic–depressive illness. In: Wehr TA, Goodwin FK, eds. Circadian rhythms in psychiatry Pacific Grove, CA: Boxwood Press; 1983:129–184.

68. Wehr TA, Moul DE, Barbato G, et al. Conservation of photoperiod-responsive mechanisms in humans. Am J Physiol 1993;265:R846–R857.

69. Wehr TA, Sack DA, Duncan WC, et al. Sleep and circadian rhythms in affective patients isolated from external time cues. Psychiatry Res 1985;15:327–339.

70. Wehr TA, Wirz-Justice A. Circadian rhythm mechanisms in affective illness and in antidepressant drug action. Pharmacopsychiat 1982;15:31–39.

71. Wever R. The circadian system of man: results of experiments under temporal isolation. New York: Springer Verlag; 1979.

72. Wever RA. Light effects on human circadian rhythms: a review of recent Andechs experiments. J Biol Rhythms 1989;4:161–185.

73. Wirz-Justice A, Graw P, Kräuchi K, et al. Light therapy in seasonal affective disorder is independent of time of day or circadian phase. Arch Gen Psychiatry 1993;50:929–937.

74. Wirz-Justice A, Graw P, Kräuchi K, Haug H-J, Leonhardt G, Brunner DP. Effect of light on unmasked circadian rhythms in winter depression. In: Wetterberg L, ed. Light and biological rhythms in man. Oxford: Pergamon Press; 1993:385–393.

75. Wu JC, Bunney WE Jr. The biological basis of an antidepressant response to sleep deprivation and relapse: review and hypothesis. Am J Psychiatry 1990;147:14–21.

76. Zucker I. Seasonal affective disorders: animal models non fingo. J Biol Rhythms 1988;3:209–223.