Gowri Sankar, D., D.V.S.P. Kumar, M. Vamsi Krishna, and P.V.M. Latha. 2016. “New Spectrophotometric Methods for the Estimation of Tolterodine Tartarate in Pharmaceutical Formulations”. Asian Journal of Chemistry 17 (2):1357-59. https://asianpubs.org/index.php/ajchem/article/view/14242.