1. T.S. Strobridge, Refrigeration for superconducting and cryogenic systems, “IEEE Transactions on Nuclear Science” (1969).
2. G.M. Gistau and J.C. Villard, High power industrial gas bearing cryogenic expansion turbines, “ICEC 14 proceedings”, Butterworth-Heinemann (1992), p. 87.
3. S. Claudet and al., New powerful cryogenic test station for the LEP200 cavities and future LHC prototype magnets, “Advances in Cryogenic Engineering”, Vol 39 (to be issued), (1993).