Siagian RC. Modeling Sunspot Activity Variability and Autoregulation in the Period 2000-2018 with Advanced Statistical Approach. MUNISI: Milit. Math & Nat. Scie. [Internet]. 2025 Dec. 18 [cited 2026 Jul. 23];3(2):62-78. Available from: https://upgradeojs.rifqisyams.id/index.php/munisi/article/view/19786