sara Zargar-Shoshtari, H. Wahhabaghei, A. Mehrsai, J. Wen, and R. Alany, “Transdermal Delivery of Bioidentical Progesterone with a Steroid 5α-Reductase Inhibitor (Dutasteride): a Pilot Study”, J Pharm Pharm Sci, vol. 13, no. 4, pp. 626–636, Jan. 2011.