Seoud, M.A., and M.A. Salim. “On Permutation Labeling”. Journal of the Egyptian Mathematical Society, vol. 19, no. 3, 2011, pp. 134-6, https://doi.org/10.1016/j.joems.2011.10.006.
Seoud, M., & Salim, M. (2011). On permutation labeling. Journal of the Egyptian Mathematical Society, 19(3), 134-136. https://doi.org/10.1016/j.joems.2011.10.006
Seoud M, Salim M. On permutation labeling. Journal of the Egyptian Mathematical Society. 2011;19(3):134-6.