KOKSHENEV, V.; SULLIVAN, N. Orientational ordering in monolayers of ortho–para hydrogen: Physics in Quantum Crystals. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 29, n. 9-10, p. 980–984, 2003. DOI: 10.1063/1.1614181. Disponível em: http://fnt.ilt.kharkov.ua/index.php/fnt/article/view/f29-0980e. Acesso em: 5 трав. 2024.