| Autori | Titlu | Publicatia | An aparitie |
| L. DRUGHEAN, D.HERA, A. GIRIP, A.TORJESCU | ARE THE ACTUAL SUBSTITUTES FOR CFC AND HCFC REALLY FRIENDLY WITH THE ENVIRONMENT? | JOIN MEETING OF IIR /SWEDEN / 65-74 | 2002 |
| D. HERA, L. DRUGHEAN, A. GIRIP | COMPARATIVE STUDY FOR SELECTING THE MOST EFFICIENT METHOD FOR REFRIGERANTS RECYCLING | 7-TH REHVA WORLD CONGRESS NAPOLI 2001/32 | 2001 |
| D.HERA, L. DRUGHEAN, A. GIRIP | EFFICIENT AND ECOLOGICAL SYSTEM FOR AN ICE RINK | JOIN MEETING OF IIR /SWEDEN / 65-74 | 2002 |