HUSSIEN, Zeinab F. Study the correlation between Sunspot Number and Solar Flux during Solar Cycle 24. Iraqi Journal of Physics, Baghdad, Iraq., v. 17, n. 42, p. 56–64, 2019. DOI: 10.30723/ijp.v17i42.423. Disponível em: https://ijp.uobaghdad.edu.iq/index.php/physics/article/view/423. Acesso em: 3 apr. 2025.