Husak, Mirko, Roman Brajša, and Dragan Špoljarić. “On the Determination of the Solar Rotation Elements I, Ω and Period Using Sunspot Observations by Ruđer Bošković in 1777”. Rudarsko-geološko-naftni zbornik 36, no. 3 (June 23, 2021). Accessed November 25, 2024. https://hrcak.srce.hr/ojs/index.php/rgn/article/view/15822.