Siddique R, Zafar R, Raza S, Iqbal SZ, Uddin Z. Mean Lifetimes of ns, np, nd, & nf Levels of N V. East Eur. J. Phys. [Internet]. 2023Sep.4 [cited 2024May17];(3):424-9. Available from: https://periodicals.karazin.ua/eejp/article/view/21877