Mondal, S., M. A. Ali, N. De, and A. Pal. “Bounds for Neighborhood Zagreb Index and Its Explicit Expressions under Some Graph Operations”. Proyecciones (Antofagasta, On Line), vol. 39, no. 4, July 2020, pp. 799-1, doi:10.22199/issn.0717-6279-2020-04-0050.