Investigating chaos in solar activity over six solar cycles. African Scientific Reports, [S. l.], v. 5, n. 2, p. 517, 2026. DOI: 10.46481/asr.2026.5.2.517. Disponível em: https://asr.nsps.org.ng/index.php/asr/article/view/517. Acesso em: 2 jul. 2026.