Y. Q Yahya, N., ندى, S. N. Abdullah, H. and هبة 2011. Optimize the maximum values mr (2, q) for parentheses in (, k, r in PG (2, q). Journal of Education and Science (JES). 24, 2 (Jun. 2011), 159–179. DOI:https://doi.org/10.33899/edusj.2011.58736.