1. [1] A. Ahmad, M. Arshad, and G. Izarikova, "Irregular labelings of helm and sun graphs", AKCE international journal of graphs and combinatorics, vol. 12, no. 2-3, pp. 161-168, Nov. 2015, doi: 10.1016/j.akcej.2015.11.010
2. [2] A. Ahmad, O. B. S. Al-Mushayt, and M. Baca, "On edge irregularity strength of graphs", Applied mathematics and computation, vol. 243, pp. 607-610, Sep. 2014, doi: 10.1016/j.amc.2014.06.028
3. [3] A. Ahmad, M. Bača, Y. Bashir, M. K. Siddiqui, "Total edge irregularity strength of strong product of two paths", Ars combinatoria, vol. 106, pp. 449-459, 2012.
4. [4] A. Ahmad, M. Bača, and M. K. Siddiqui, "On edge irregular total labeling of categorical product of two cycles", Theory of computing systems, vol. 54, no. 1, pp. 1-12, Apr. 2013, doi:10.1007/s00224-013-9470-3
5. [5] A. Ahmad, M. Bača, M., M. F. Nadeem, "On edge irregularity strength of Toeplitz graphs", Scientific Bulletin - "Politehnica" University of Bucharest. Series A, Applied mathematics and physics, vol. 78, no. 4, pp. 155-162, 2016. [On line]. Available: https://bit.ly/2N3aeOZ