HASAN J H ABUOWDA; VEENA MATHAD. On Fourth Leap Zagreb Index of Some Graph Operations. International Journal of Mathematics And its Applications, [S. l.], v. 14, n. 2, p. 331–341, 2026. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1685. Acesso em: 11 sep. 2026.