Koike, K. and others, 1997. The pituitary folliculo-stellate cell line TtT/GF augments basal and TRH-inducedprolactin secretion by GH3 cells. Life Sci, 61 (25), 2491–2497; Tyson, J.E. and others, 1975. The influence of prolactine secretion on human lactation. J. Clin. Endocrinol Metab, 40 (5), 764–773.