A. Leont’eva, A. Erenburg, and A. Prokhorov, “Low-frequency internal friction (LFIF) as express method for identification of cryocrystals in pores of the solids”, Rec.Contr.Phys., vol. 50, no. 3, pp. 39–40, Jan. 2015, Accessed: Sep. 11, 2026. Available: https://bph.kaznu.kz/index.php/zhuzhu/article/view/811