HASAN, A. K.; OBEED, F. H.; RAHIM, A. N. Positive Parity Levels of 21,23Na Isotopes by Using the Nuclear Shell. Ukrainian Journal of Physics, [S. l.], v. 65, n. 1, p. 3, 2020. DOI: 10.15407/ujpe65.1.3. Disponível em: https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019340. Acesso em: 23 jan. 2022.