KANI C., ASHA S. 4-Square Sum E-Cordial Labeling for Some Graphs . Mathematical Statistician and Engineering Applications, [S. l.], v. 71, n. 4, p. 1475–1480, 2022. DOI: 10.17762/msea.v71i4.643. Disponível em: https://www.philstat.org/index.php/MSEA/article/view/643. Acesso em: 29 apr. 2024.