MALČESKI, Risto. \(n\)-SEMI INNER PRODUCT SPACES. Matematichki Bilten, [S. l.], v. 25, n. 1, p. 53–66, 2001. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1686. Acesso em: 14 aug. 2026.