Abishev, M., Toktarbay, S., Khassanov, M., & Abylayeva, A. (2018). Propagation of a electromagnetic radiation in the strong magnetic quadrupole and gravitational field. Хабаршы. Физика сериясы, 2018(3), 4-11. https://bph.kaznu.kz/index.php/zhuzhu/article/view/775