1. A 4 K mechanical refrigerator for space applications;Bradshaw,1988
2. A design study on a multi-stage Stirling cycle cooler for space applications;Bradshaw;Final report on ESA contract number 6342/85/NL/PB(SC),1986
3. ESA contract with BAe to industrialize the RAL 20 K cooler, reference 9004/90/NL/PP
4. Development of a small Stirling cycle cooler for space flight applications;Werrett;Adv Cryog Eng,1986