Suerbaev, Kh., and G. Zhaksylikova. ‚ÄúSpasmolytic Medicine Novovalidolum‚ÄĚ. Chemical Bulletin of Kazakh National University, no. 1 (March 30, 2011): 76-79. Accessed August 11, 2020. https://bulletin.chemistry.kz/index.php/kaznu/article/view/853.