1. A research on auto-cascade refrigeration system;Du;Cryogenics,2002
2. W.A. Little, Kleemenko cycle coolers: low cost refrigeration at cryogenic temperatures, in: ICEC17, 1998, pp. 1–9.
3. A throttle cycle refrigerator operating below 77K;Khavri;Adv. in Cryogenic Eng.,1996
4. Theoretical and experimental investigations of advantageous refrigerant mixture applications;Kruse;ASHRAE Trans.,1985
5. C. Weng, Non-CFC auto-cascade refrigeration system, US Patent 5408848, 1995.