PANCHEVA, D. V.; MUKHTAROV, P. Y. A single-station spectral model of the monthly median F-region critical frequency. Annals of Geophysics, [S. l.], v. 39, n. 4, 1996. DOI: 10.4401/ag-4020. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/4020. Acesso em: 28 mar. 2024.