C. T. Omarov, “ANALYTICAL APPROACH TO THE DIRECT COLLISIONS PROBLEM IN ACTIVE GALAXY NUCLEUS”, Rec.Contr.Phys., vol. 2009, no. 1, pp. 65–67, Mar. 2009, Accessed: Jul. 14, 2026. [Online]. Available: https://bph.kaznu.kz/index.php/zhuzhu/article/view/175