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O’Hara, B. ., Young, K. ., Watson, F. ., Heller, H. ., & Kilduff, T. . (1993). Immediate early gene expression in brain during sleep deprivation: preliminary observations. Sleep, 16(1), 1-7. https://doi.org/10.1093/sleep/16.1.1

Bitting, L. ., Sutin, E. ., Watson, F. ., Leard, L. ., O’Hara, B. ., Heller, H. ., & Kilduff, T. . (1994). C-fos mRNA increases in the ground squirrel suprachiasmatic nucleus during arousal from hibernation. Neuroscience Letters, 165(1-2), 117-21. https://doi.org/10.1016/0304-3940(94)90723-4 (Original work published 1994)

Clegg, D. ., O’Hara, B. ., Heller, H. ., & Kilduff, T. . (1995). Nicotine administration differentially affects gene expression in the maternal and fetal circadian clock. Brain Research. Developmental Brain Research, 84(1), 46-54. https://doi.org/10.1016/0165-3806(94)00152-p (Original work published 1995)

O’Hara, B. ., Andretic, R. ., Heller, H. ., Carter, D. ., & Kilduff, T. . (1995). GABAA, GABAC, and NMDA receptor subunit expression in the suprachiasmatic nucleus and other brain regions. Brain Research. Molecular Brain Research, 28(2), 239-50. https://doi.org/10.1016/0169-328x(94)00212-w

Welch, S. ., O’Hara, B. ., Kilduff, T. ., & Heller, H. . (1995). Sequence and tissue distribution of a candidate G-coupled receptor cloned from rat hypothalamus. Biochemical and Biophysical Research Communications, 209(2), 606-13. https://doi.org/10.1006/bbrc.1995.1543 (Original work published 1995)

O’Hara, B. ., Watson, F. ., Andretic, R. ., Wiler, S. ., Young, K. ., Bitting, L. ., … Kilduff, T. . (1997). Daily variation of CNS gene expression in nocturnal vs. diurnal rodents and in the developing rat brain. Brain Research. Molecular Brain Research, 48(1), 73-86. https://doi.org/10.1016/s0169-328x(97)00084-3

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

Kilduff, T. ., Vugrinic, C. ., Lee, S. ., Milbrandt, J. ., Mikkelsen, J. ., O’Hara, B. ., & Heller, H. . (1998). Characterization of the circadian system of NGFI-A and NGFI-A/NGFI-B deficient mice. Journal of Biological Rhythms, 13(4), 347-57. https://doi.org/10.1177/074873098129000174

Franken, P. ., Thomason, R. ., Heller, H. ., & O’Hara, B. . (2007). A non-circadian role for clock-genes in sleep homeostasis: a strain comparison. BMC Neuroscience, 8, 87. https://doi.org/10.1186/1471-2202-8-87 (Original work published 2007)