Faker Al-Dean Fadel, Ibtehal, ابتهال, Muzahem Al-Hashimi, and مزاحم. “Locally Weighted Regression for Sunspots Estimation and Prediction”. IRAQI JOURNAL OF STATISTICAL SCIENCES 19, no. 2 (June 25, 2025): 15–23. Accessed August 6, 2025. https://rjps.uomosul.edu.iq/index.php/stats/article/view/20896.