1. H. Quack, Arbeitsleistende Expansion in Kaltdampf—Kältekreisläufen, DKV-Tagungsbericht 26 (1999) Band I 109–123.
2. Cryogenic expanders, ICEC 18, Mumbai;Quack,2000
3. Throttle loss power recovery in refrigeration and cryogenics;Brasz,2003
4. Carbon dioxide as a refrigerant for railway refrigeration and air conditioning;Quack,1994
5. Expander–compressor for a more efficient use of CO2 as refrigerant;Heyl,1998