BUTSAN , G. P.; LYATAMBUR , K. N. Primary multiplicative systems of almost linear operators for almost linear additive operator system without continuity conditions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 40, n. 6, p. 717–724, 1988. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9280. Acesso em: 5 dec. 2025.