University of Mining and Geology "St. Ivan Rilski "- Sofia
Scientific and Technical Union of Mining, Geology and Metallurgy – Bulgaria
University "Goce Delchev" - Stip - Faculty mining
Francophone Institute for Administration and Management - Sofia
Bulgarian Chamber of mining and Geology
Scientific GeoConference & Expo SGEM
Balkan Mineral Processing Congres Sozopol 2013
Balkan Mining Congres BALKANMINE Ohrid 2013
Булекспортконсулт ЕООД - 2011 - www.bulexportconsult.com
Design by MSAgency LTD
