N. B. Rathod, and K. K. Kanani. 2017. “$k$-Cordial Labeling of Triangular Belt, Alternate Triangular Belt, Braid Graph and $Z$-$P_n$”. International Journal of Mathematics And Its Applications 5 (4 - E):655-62. https://ijmaa.in/index.php/ijmaa/article/view/1323.