TRIPPE, C.; KLÜMPER, A. Quantum phase transitions and thermodynamics of quantum antiferromagnets with competing interactions. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 33, n. 11, p. 1213–1221, 2007. DOI: 10.1063/1.2747066. Disponível em: https://fnt.ilt.kharkiv.ua/index.php/fnt/article/view/f33-1213e. Acesso em: 4 груд. 2024.