Barakat, M. ., O’Hara, B. ., Cao, V. ., Heller, H. ., & Ruby, N. . (2005). Light induces c-fos and per1 expression in the suprachiasmatic nucleus of arrhythmic hamsters. American Journal of Physiology. Regulatory, Integrative and Comparative Physiology, 289(5), R1381-6. https://doi.org/10.1152/ajpregu.00695.2004

Barakat, M. ., O’Hara, B. ., Cao, V. ., Larkin, J. ., Heller, H. ., & Ruby, N. . (2004). Light pulses do not induce c-fos or per1 in the SCN of hamsters that fail to reentrain to the photocycle. Journal of Biological Rhythms, 19(4), 287-97. https://doi.org/10.1177/0748730404266771

O’Hara, B. ., Macdonald, E. ., Clegg, D. ., Wiler, S. ., Andretic, R. ., Cao, V. ., … Kilduff, T. . (1999). Developmental changes in nicotinic receptor mRNAs and responses to nicotine in the suprachiasmatic nucleus and other brain regions. Brain Research. Molecular Brain Research, 66(1-2), 71-82. https://doi.org/10.1016/s0169-328x(99)00004-2 (Original work published 1999)

O’Hara, B. ., Edgar, D. ., Cao, V. ., Wiler, S. ., Heller, H. ., Kilduff, T. ., & Miller, J. . (1998). Nicotine and nicotinic receptors in the circadian system. Psychoneuroendocrinology, 23(2), 161-73. https://doi.org/10.1016/s0306-4530(97)00077-2