HUSAK, M.; BRAJŠA, R.; ŠPOLJARIĆ, D. On the Determination of the Solar Rotation Elements i, Ω and Period using Sunspot Observations by Ruđer Bošković in 1777. Rudarsko-geološko-naftni zbornik (The Mining-Geological-Petroleum Engineering Bulletin) , [S. l.], v. 36, n. 3, 2021. DOI: 10.17794/rgn.2021.3.6. Disponível em: https://hrcak.srce.hr/ojs/index.php/rgn/article/view/15822. Acesso em: 24 oct. 2021.