Salhab et al., 1999. Contraception, 59 (6): 395-400

Salhab, A. S.; Shomaf, M. S.; Gharaibeh, M. N.; Amer, N. A., 1999. Effects of castor bean extract and ricin A-chain on ovulation and implantation in rabbits. Contraception, 59 (6): 395-400