9Wehrenberg W B, Wardlaw S L, Frantz A G, et, al. Beta-Endorphin in hypophyseal portal blood: variations throughout the menstrual cycle [J]. Endocrinology, 1982, 111 (3): 879.
10Knepet W, Nutto D, Vlaskovska M, et al. Inhibition by prostaglandin E2 of the release of vasopressin and beta-endorphin from rat pituitary neurointermediate lobe or medial basal hypothalamus in vitro[J].Endocrinology, 1985, 106 (2): 189.
