Arlievsky, M., G. Vlasova, P. Vlasov, and R. Kurtenkov. “Researching and Developing the Process of Production Superphosphate Using Spent Sulphuric Acid”. Chemical Bulletin of Kazakh National University 63, no. 3 (March 14, 2018): 31-36. Accessed November 24, 2024. https://bulletin.chemistry.kz/index.php/kaznu/article/view/833.