Nurlybaev, I., and B. Imangalieva. “About the Formulation of the Periodic Law (PL) and Periodic System of D.I. Mendeleev”. Chemical Bulletin of Kazakh National University 64, no. 4 (December 1, 2011): 173-175. Accessed November 21, 2024. https://bulletin.chemistry.kz/index.php/kaznu/article/view/527.