Abayev, M. (2008) “MASS VARIATION LAWS BY HILL APPROXIMATION IN THE RESTRICTED THREE BODY PROBLEM WITH VARIABLE MASSES”, Recent Contributions to Physics, 2008(1), pp. 135–141. Available at: https://bph.kaznu.kz/index.php/zhuzhu/article/view/1472 (Accessed: 9 February 2026).