AVAKYAN, Elena Z.; AVAKYAN, Sergey L. Description of scalar mesons as two and four quark states. Journal of the Belarusian State University. Physics, [S. l.], n. 1, p. 72–87, 2019. Disponível em: https://journals.bsu.by/index.php/physics/article/view/1385. Acesso em: 18 jul. 2026.