1. Application of natural refrigerants;Lorentzen;IIR Annex,1993
2. Scepticism about R134a justified;Banks;Refrig Air Condit,1993
3. Hygiene, Inst. Dortmund, Speech at IKK 93, Essen;Rosin;Scan Ref,1993
4. Leveringsgrad og virkningsgrad for kjølekompressor;Lorentzen,1940