GORUNOVICH, V. V. Phase transition in an exactly solvable model of interacting bosons. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 49, n. 2, p. 196–205, 1997. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4997. Acesso em: 6 dec. 2025.