1. Anderson, M., Vitray, R., Yellen, J.: Irregular colorings of regular graphs. Discret. Math. 312(15), 2329–2336 (2012)
2. Avudainayaki, R., Selvam, B., Thirusangu, K.: Irregular coloring of some classes of graphs. Int. J. Pure Appl. Math. 109(10), 119–127 (2016)
3. Michalak, D.: On Middle and Total Graphs with Coarseness Number Equal 1, Springer Verlag Graph Theory, Lagow Proceedings, pp. 139–150. Springer, Berlin (1981)
4. Gallian, J.A.: A dynamic survey of graph labeling. Electron. J. Combinator. 18, 6 (2011)
5. Harary, F.: Graph Theory. Narosa Publishing home, New Delhi (1969)