TIWARI, B. R.; KUMAR, M. The Solar Flux and Sunspot Number; A Long-Trend Analysis. International Annals of Science, [S. l.], v. 5, n. 1, p. 47–51, 2018. DOI: 10.21467/ias.5.1.47-51. Disponível em: https://journals.aijr.org/index.php/ias/article/view/751. Acesso em: 6 jan. 2025.