Husak, M., Brajša, R., & Špoljarić, D. (2021). 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(3). https://doi.org/10.17794/rgn.2021.3.6