Kaneria, V. J., M. Meghpara, and H. M. Makadia. “GRACEFUL LABELING FOR ONE POINT UNION OF PATH AND BARYCENTRIC SUBDIVISION OF A GRID GRAPH”. International Journal Of Mathematics And Computer Research, Vol. 2, no. 09, Sept. 2014, pp. 624-9, https://ijmcr.in/index.php/ijmcr/article/view/169.