2010/11: 7th South-East European Congress and Exhibition on EE & RES, 13 – 15 April 2011, Sofia, Bulgaria
2010/11: 7th South-East European Congress and Exhibition on EE & RES, 13 – 15 April 2011, Sofia, Bulgaria
2010/11: 7th South-East European Congress and Exhibition on EE & RES, 13 – 15 April 2011, Sofia, Bulgaria