HALDER, D. Regression Analysis of Sunspot Numbers for the Solar Cycle 24 in Comparison to Previous Three Cycles. JOURNAL OF ADVANCES IN PHYSICS, [S. l.], v. 4, n. 2, p. 477–483, 2014. DOI: 10.24297/jap.v4i2.2030. Disponível em: https://rajpub.com/index.php/jap/article/view/1282. Acesso em: 5 may. 2024.