GLAVAN, V. A. The structure of linear extensions with the Favard type conditions II. Linear extensions with the additivity property of recurrent motions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 4, p. 466–471, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5833. Acesso em: 5 dec. 2025.