MEERA MEGHPARA; H. M. KARAVADIYA; V. J. KANERIA. A Study on $\alpha-$graceful Labeling of Spade Graph. International Journal of Mathematics And its Applications, [S. l.], v. 9, n. 1, p. 113–117, 2021. Disponível em: http://ijmaa.in/index.php/ijmaa/article/view/108. Acesso em: 6 may. 2024.