Oestrus and LH reponses to oestradiol during lactational anoestrus in Chinese Meishan and Large White sows F. Elsaesser, F. Martinat-Botté, N. Parvizi and M. Terqui Reprod. Nutr. Dev., 32 3 (1992) 307-312 DOI: 10.1051/rnd:19920310