Morel G, Gourdji D, Grouselle D, Brunet N, Tixier-Vidal A, Dubois PM. Immunocytochemical evidence for in vivo internalization of thyroliberin into rat pituitary target cells. Neuroendocrinology. 1985 Oct;41(4):312–20. doi: 10.1159/000124195. PMID: 3930986.