Arai, A. et al. 1990. In vitro effects of testosterone, dihydrotestosterone and estradiol on cell growth of human hair bulb papilla cells and hair root sheath fibroblasts. Acta Dermato-Venereologica. 70, 4 (Jul. 1990), 338–341. DOI:https://doi.org/10.2340/0001555570338341.