PHYS., Comm. Cover 1 and Contents. <b>Communications in Physics</b>, <i>[S. l.]</i>, v. 21, n. 1, 2011. DOI: 10.15625/0868-3166/21/1/3577. Disponível em: https://vjs.ac.vn/cip/article/view/3577. Acesso em: 2 jan. 2026.