System for detection of solar flares in very low frequency band. Revista de Investigaciones Universidad del Quindío, [S. l.], v. 26, n. 1, p. 105–113, 2017. DOI: 10.33975/riuq.vol26n1.136. Disponível em: https://revistas.uniquindio.edu.co/ojs/index.php/riuq/article/view/136. Acesso em: 25 jun. 2026.