1. G. Walker, “Cryocoolers, Part I: Fundamentals” Plenum Publishing Corp., New York (1983). pps. 245–261.
2. T. Kuriyama et al., Two-Stage GM Refrigerator with Er3Ni Regenerator for Helium Liquefaction, in: “Proceedings of the Sixth International Cryocoolers Conference, Vol. II”, Report# DTRC-91/002, David Taylor Research Center, Bethesda Md (1991), pg. 3.
3. T. Inaguchi et al, Two-Stage Gifford-McMahon cycle Cryocooler Operating at about 2 K, in:, “Proceedings of the Sixth International Cryocoolers Congerence, Vol. II”, Report #DTRC-91/002, David Taylor Research Center, Bethesda Md.(1991), pg. 25.
4. L. Aprigliano et al, Development of Neodymium and Er3Ni Regenerator Materials, in: “Advances in Cryogenic Engineering”, Vol. 37, Plenum Press, New York, (1992).
5. M. Sahashi et al, New Magnetic Material R3T System with Extremely Large Heat Capacities Used as Heat Regenerators, in: “Advances in Cryogenic Engineering”, Vol 35B, Plenum Press, New York, (1989), p.1175.