Pogorui A. О. Fading evolutions in multidimensional spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 11, p. 1577–1582, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2982. Acesso em: 6 dec. 2025.