http://ec.europa.eu/social/main.jsp?langId=bg&catId=26- European Commission, EU Social Security Coordination

 

http://ec.europa.eu/social/main.jsp?langId=bg&catId=509- European Commission, European Health Insurance Card

 

http://ec.europa.eu/social/main.jsp?catId=815&langId=bg- Social protection systems - MISSOC

 

http://ec.europa.eu/social/main.jsp?catId=858&langId=bg- Guides to national social security systems(MISSOC) - Your rights country by country

 

http://www.missoc.org/MISSOC/INFORMATIONBASE/COMPARATIVETABLES/MISSOCDATABASE/comparativeTableSearch.jsp-Comparative tables on social protection

 

http://ec.europa.eu/social/main.jsp?catId=1098&langId=en - Network of legal experts (FreSsco)

 

http://www.tress-network.org/ - Former network of experts 2004-2013 (trESS)

 

http://www.nap.bg/en/- National Revenue Agency (determine applicable legislation in the field of social security)

 

http://www.nssi.bg/en/ - National Social Security Institute

 

http://www.en.nhif.bg/web/guest/home- National Health Insurance Fund

Social rights in the EU