Askarova, A.S., S.A. Bolegenova, S.A. Bolegenova, V.Yu. Maximov, and M.T. Beketayeva. “Study of Nitrogenous Substances Formation During Combustion of Coal”. Recent Contributions to Physics 2017, no. 3 (September 25, 2017): 4–9. Accessed February 2, 2026. https://bph.kaznu.kz/index.php/zhuzhu/article/view/552.