SKRYPNIK, W. I. Equilibrium in quantum systems of particles with magnetic interaction. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 47, n. 12, p. 1686–1691, 1995. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5562. Acesso em: 6 dec. 2025.