1. S. K. Nemirovskii, Inzh.-Fiz. Zh.,43, No. 4, 676?692 (1982).
2. P. Seyfert, Proc. ICEC9, Guildford (1982), pp. 263?268.
3. S. W. Van Sciver, Adv. Cryog. Eng.,27, 375?398 (1982).
4. S. Patterman, Hydrodynamics of Superfluid Liquid [Russian translation], Moscow (1978).
5. V. F. Vinen, Progr. Low Temp. Phys.,3, 1?57 (1961).