Hemati, Ehsanullah, and Mohammad Zubair Tanweer. “Three-Dimensional Graph Drawing Procedures for Functions of Two and Several Variables”. Journal for Research in Applied Sciences and Biotechnology 2, no. 5 (October 13, 2023): 29–32. Accessed November 21, 2024. https://jrasb.stallionpublication.com/index.php/jrasb/article/view/315.