Hashemi, Nourooz, Hamidreza Kashefi, and Mohd Salleh Abu. “The Emphasis on Generalization Strategies in Teaching Integral: Calculus Lesson Plans”. Sains Humanika 12, no. 3 (August 27, 2020). Accessed August 13, 2022. https://sainshumanika.utm.my/index.php/sainshumanika/article/view/1687.