ASKAROVA, A.; BOLEGENOVA, S.; BOLEGENOVA, S.; MAXIMOV, V.; BEKETAYEVA, M. Study of nitrogenous substances formation during combustion of coal. Recent Contributions to Physics, [S. l.], v. 2017, n. 3, p. 4–9, 2017. Disponível em: https://bph.kaznu.kz/index.php/zhuzhu/article/view/552. Acesso em: 9 feb. 2026.