Shalenov, E., Dzhumagulova, K., Ramazanov, T. and Dzhumagulov, M. (2017) “Investigation of the excitation of the internal states of hydrogen atom”, Recent Contributions to Physics, 2017(3), pp. 26–33. Available at: https://bph.kaznu.kz/index.php/zhuzhu/article/view/555 (Accessed: 2 February 2026).