1. Space engineering model cryogen free ADR for future ESA space missions;Hepburn;Adv Cryog Eng,2004
2. Hepburn ID, Brockley-Blatt C, Coker P, Crofts E, Winter B, Hardy G, et al. Design and development of a space engineering model cryogen free ADR for future ESA space missions. In: CryoPrague 2006, proceedings of ICEC 21, twenty first international cryogenic engineering conference, Icaris Ltd.; 2006. p. 323–6.
3. DGG crystal grown by The Crystal Consortium (TCC) Ltd., Glasgow (UK). (It should be noted that TCC are no longer trading.)
4. A thermal switch for use at liquid helium temperature in space-bourne cryogenic systems;Duband,1995
5. L. Duband, private communication.