Uribe Velásquez, L.F. , Lenz Souza, M.I. and Correa Orozco, A. 2011. Effect of high progesterone concentrations during the early luteal phase on LH and estradiol secretion in ewes. Revista Veterinaria y Zootecnia (On Line). 5, 2 (Dec. 2011), 44–54.