عبدالكبير سالم أحمد عبدالله. “CONSTRUCTING FORMAL MATHEMATICAL PROBLEMS WITH A NTH FORM USING INDUCTION (HOW MANY TRIANGLES IN TRIANGLE?)”. Electronic Journal of University of Aden for Humanity and Social Sciences 4, no. 1 (March 31, 2023): 149–183. Accessed January 10, 2025. https://ejua.net/index.php/EJUA-HS/article/view/241.