Induced breeding in anestrous milking ewes by using twice-repeated PMS combined with estradiol-17β T. ALIFAKIOTIS, I. MATSOUKAS, I. HATJIMINAOGLOU, N. ZERVAS and H. KOUGOULOS Ann. Biol. anim. Bioch. Biophys., 18 2A (1978) 229-235 DOI: 10.1051/rnd:19780202