1. Nat. Inst. for R&D in Electrical Engineering ICPE-CA Bucharest,Quality Management. Environment Dept.,Bucharest,Romania
2. R&D Institute-ICPE Bistrita S.A.,Electrical & Automation Dept.,Bistrita,Romania
3. R&D Institute-ICPE Bistrita S.A.,Wastewater treatment Dept.,Bistrita,Romania
4. Nat. Inst. for R&D in Electrical Engineering ICPE-CA Bucharest,Renewable Sources and Energy Efficiency Dept.,Bucharest,Romania