Alghoussein, Ahmad, Ziad Kanaya, and Salwa Yacoub. “Solve Special Case of Some Guran Problems”. Theory and Applications of Mathematical Science Vol. 2 (February 12, 2020): 138-142. Accessed June 19, 2026. https://stm1.bookpi.org/index.php/tams-v2/article/view/1029.