1. Fairbank, W.M., Buckingham, M.J., Kellers, C.F.: In: Dillinger, J.R. (ed.) Proc. 5th International Conference on Low Temperature Physics, p. 50. University of Wisconsin Press, Madison (1957)
2. Buckingham, M.J., Fairbank, W.M.: In: Gorter, C.J. (ed.) Progress in Low Temperature Physics, vol. III, p. 86. North Holland, Amsterdam (1961)
3. Onsager, L.: Phys. Rev. 65, 117–149 (1944)
4. Bagataskii, M.I., Voronel, A.V., Gusak, V.G.: Z. Eksp. Teor. Fiz. 43, 728–729 (1962) [English translation: Sov. Phys. JETP 16, 517–518 (1963)]
5. Voronel, A.V., Chaskin, Yu., Popov, V.A., Simkon, V.G.: Z. Eksp. Teor. Fiz. 45, 828–830 (1963) [English translation: Sov. Phys. JETP 18, 568–569 (1964)]