1. Bondy, J.A., Murty, U.S.R.: Graph Theory. Springer, New York (2008)
2. Borosh, I., Hensley, D., Hobbs, A.M.: Vertex prime graphs and the Jacobsthal function. Congr. Numer. 127, 193–222 (1997)
3. Deretsky, T., Lee, S.-M., Mitchem, J.: On vertex prime labelings of graphs, Graph Theory, Combinatorics, and Applications, Vol. 1 (Kalamazoo, MI, 1988), 359–369, Wiley, New York (1991)
4. Gallian, J.A.: A dynamic survey of graph labeling. Electr. J. Combin. #DS6 (2015)
5. Ghorbani, E., Kamali, S.: Prime labeling of ladders (2017).
arXiv:1610.08849