Pathak, Santosh, and Eeshwar Poudel. “Graphing of Functions and Graphical Aspects in Lessons of Secondary School Mathematics Textbooks in Nepal: A Problem Analysis Approach”. Academic Journal of Mathematics Education 7, no. 1 (December 31, 2024): 57–73. Accessed December 8, 2025. https://nepjol.info/index.php/ajme/article/view/81459.