PICKETT, G. R. Superfluid ³He in the zero temperature limit (Review Article): . ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 23, n. 5-6, p. 499–508, 1997. Disponível em: http://80.92.230.95/index.php/fnt/article/view/f23-0499e. Acesso em: 10 лис. 2025.