1. The influence of lubricant on heat pump performance;Hughes,1980
2. The effect of lubricant-refrigerant solubility on heat pump performance;Hughes,1982
3. Influence of oil on evaporator heat transfer (results for R12 and Shell Clavus 33);Hughes;Int. J. Refrigeration,1984
4. Measurements on oil-rich refrigeration systems;McMullan,1984
5. The influence of lubricating oil on heat pump performance;McMullan,1982