Faker Al-Dean Fadel, Ibtehal, and Muzahem Al-Hashimi. “Locally Weighted Regression for Sunspots Estimation and Prediction”. IRAQI JOURNAL OF STATISTICAL SCIENCES 19, no. 2 (December 1, 2022): 15–23. Accessed September 6, 2025. https://tanmiyat.uomosul.edu.iq/index.php/stats/article/view/29340.