root, root. “Comparison of the Kernel Regression and Spline Regression Methods in Estimating the Poisson Regression Model With a Practical Application”. Warith Scientific Journal 6, no. 17 (March 30, 2024): 329-338. Accessed September 16, 2024. http://wsj.uowa.edu.iq/index.php/warith/article/view/205.