GOWRI SANKAR, D., et al. “Simultaneous Determination of Tamulosin Hydrochloride and Finasteride in Formulations by Reverse-Phase HPLC”. Asian Journal of Chemistry, vol. 19, no. 2, Mar. 2010, pp. 1375-8, https://asianpubs.org/index.php/ajchem/article/view/20257.