Elektrorazpredelenie Yug: www.elyug.bg
EVN AG: www.evn.at
Bulgarian Society for the Protection of Birds: http://bspb.org
BirdLife International: http://www.birdlife.org
LIFE programme: http://europa.eu/legislation_summaries/environment/general_provisions/l28021_bg.htm
Ministry of Environment and Water, LIFE programme: http://www.moew.government.bg/?show=183
European Commission http://ec.europa.eu/
Natura 2000 - protected areas in the EU: http://ec.europa.eu/environment/basics/natural-capital/natura2000/
LIFE programme "Conservation of Imperial Eagle and Saker Falcon in their key places in the Natura 2000 network in Bulgaria": http://www.saveraptors.org
Project "LIFE for the Burgas lakes" http://www.burgaslakes.org
Project LIFE "Emergency measures for the conservation of Neophron percnopterus in Bulgaria and Greece" http://lifeneophron.eu/bg/
Madzharovo Special Protection Area in the Eastern Rhodope Mountains http://bspb.org/madjarovo/bg/
Nature Conservation Center "Poda" http://bspb.org