ADAMENKO, I.; KITSENKO, Y.; NEMCHENKO, K.; SLIPKO, V.; WYATT, A. Three-phonon relaxation in isotropic and anisotropic phonon systems of liquid helium at different pressures. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, Харків, Україна, v. 31, n. 6, p. 607–619, 2005. DOI: 10.1063/1.1943527. Disponível em: https://fnt.ilt.kharkov.ua/index.php/fnt/article/view/f31-0607e. Acesso em: 4 груд. 2024.