SYSHCHENKO, A.; DAY, J.; BEAMISH, J. Defects and supersolidity: effects of annealing and stress on elastic behavior of solid ⁴He: Твердый гелий. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 34, n. 4-5, p. 427–430, 2008. DOI: 10.1063/1.2911652. Disponível em: http://fnt.ilt.kharkiv.ua/index.php/fnt/article/view/f34-0427e. Acesso em: 3 трав. 2024.