Khalifa, Abdelgadir, and Alsaidi Altaher. “A Comparative Study of Some Robust Nonlinear Regression Methods”. Journal of Pure & Applied Sciences 18, no. 3 (May 1, 2019): 18–22. Accessed September 12, 2026. https://www.sebhau.edu.ly/journal/jopas/article/view/225.