V. Yegnanarayanan, B. Logeshwary
      On vertex coloring of graphs
      International Journal of Mathematical Analysis, Vol. 9, 2015, no. 17, 857-868
      http://dx.doi.org/10.12988/ijma.2015.5379

Copyright © 2014 V. Yegnanarayanan and B. Logeshwary. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.