J. Anitha, G. Arul Freeda Vinodhini, S. Muthukumar (2021) “2-Domination Number in Special Classes of Graphs”, Annals of the Romanian Society for Cell Biology, pp. 1973–1978. Available at: http://annalsofrscb.ro/index.php/journal/article/view/4728 (Accessed: 3April2026).