GREC , G. . Helioseismology. Low degree oscillations of the Sun : From the South Pole to SoHO: (the point of view of an observer). Известия Крымской астрофизической обсерватории, [S. l.], v. 104, n. 2, p. 54–98, 2008. Disponível em: https://jncrao.ru/index.php/izvcrao/article/view/666. Acesso em: 22 ноя. 2024.