Khavidі Kh. M. Mutual arrangement of subspaces in a finitely meric unitary space . Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 18, n. 6, p. 130–134, 1966. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/8470. Acesso em: 6 dec. 2025.