Menassol, J. B., Collet, A., Chesneau, D., Malpaux, B., & Scaramuzzi, R. J. The Interaction Between Photoperiod and Nutrition and Its Effects on Seasonal Rhythms of Reproduction in the Ewe. BIOLOGY OF REPRODUCTION, 86(2), https://doi.org/10.1095/biolreprod.111.092817