FORMISANO, T.; KISSIN, E. Minimax conditions for Schatten ideals of compact operators. Eurasian Mathematical Journal, [S. l.], v. 3, n. 1, p. 29–40, 2012. Disponível em: https://emj.enu.kz/index.php/main/article/view/772. Acesso em: 16 sep. 2025.