ANEVSKA, Samoil Malčeski, Katerina; MALČESKI, Risto. NEW CHARACTERIZATION OF 2-PRE-HILBERT SPACE. Matematichki Bilten, [S. l.], v. 38, n. 1, 2014. DOI: 10.37560/matbil14100035m. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1785. Acesso em: 13 jun. 2026.