European Union
- European Union – http://europa.eu
- European Commission – http://ec.europa.eu/index_en.htm
- Regional Policy-Inforegio – http://ec.europa.eu/regional_policy/index_en.cfm
- European Regional Development Fund (ERDF) – http://ec.europa.eu/regional_policy/thefunds/regional/index_en.cfm
- European Territorial Cooperation – http://ec.europa.eu/regional_policy/cooperate/cooperation/index_en.cfm
Greece
- Hellenic Government – government.gr
- Ministry of Economy and Development – mindev.gov.gr
- Managing Authority of European Territorial Cooperation Programmes – interreg.gr
- Region of Central Macedonia – pkm.gov.gr/
- Region of Eastern Macedonia-Thrace – pamth.gov.gr
- Decentralised Region of Macedonia-Thrace – damt.gov.gr
Bulgaria
- Ministry of Regional Development and Public Works – http://www.mrrb.government.bg
- District of Kardjali – http://www.kj.government.bg
- District of Haskovo – http://www.hs.government.bg
- District of Smolyan – http://region-smolyan.org
District of Blagoevgrad – http://www.bl.government.bg