Suerbaev, K., G. Seitenova, and F. Kanapieva. “Antitituberculosis Medicine Pasa (p-Aminosalicylic Acid)”. Chemical Bulletin of Kazakh National University, Vol. 61, no. 1, Mar. 2011, pp. 71-75, https://bulletin.chemistry.kz/index.php/kaznu/article/view/851.