almudier, Ali Mohammed. “Pfaff’s Differential Equation in Three Variables (discussion of Solution Methods)”. Scientific Journal of Faculty of Education, Misurata University 1, no. 01 (June 1, 2014): 295–312. Accessed November 7, 2026. https://journals.misuratau.edu.ly/edu/ojs/index.php/eduction/article/view/313.