1. P. V. Mason, Space cryogenics in the 1980’s, in “Proc. 8th Int. Cryog. Eng. Conf.”, IPC Press, Guildford (1980) p. 6.
2. K. Luders and G. Klipping, Phase separation under zero g conditions, in “Proc. 8th Int. Cryog. Eng. Conf.”, IPC Press, Guildford (1980) p. 14.
3. J. B. Hendricks and G. R. Karr, Characterization of superfluid porous plug performance, in “Proc. 9th Int. Cryog. Eng. Conf.”, Butterworth, Guildford (1982) p. 190.
4. U. Schotte and H. D. Denner, The mechanism governing phase separation of Helium II by means of narrow channels, in “Proc. 8th Int. Cryog. Eng. Conf.”, IPC Press, Guildford, 1980, p. 27.
5. J. R. Becker, P. Blaser, M. Perdu and R. Prost, Passive phase separator for superfluid helium for the European space cryostat “Chresus”, in “Proc. 8th Int. Cryog. Eng. Conf.”, IPC Press, Guildford (1980) p. 22.