Dayap, Jonecis Adolfo, and Enrico Limbo Enriquez. “Outer-Convex Domination in the Composition and Cartesian Product of Graphs”. Journal of Global Research in Mathematical Archives(JGRMA), vol. 6, no. 3, Mar. 2019, pp. 34-42, https://jgrma.com/index.php/jgrma/article/view/526.