Warner, A., Jethwa, P. H., Wyse, C. A., I'Anson, H., Brameld, J. M., & Ebling, F. J. (2010). Effects of photoperiod on daily locomotor activity, energy expenditure, and feeding behavior in a seasonal mammal. AJP - Regulatory, Integrative and Comparative Physiology, 298(5), R1409-R1416. https://doi.org/10.1152/ajpregu.00279.2009