https://ec.europa.eu/anti-fraud/sites/antifraud/files/olaf_report_2016_en.pdf
https://mera25.gr/manifesto/
http://www.ohchr.org/Documents/HRBodies/HRCouncil/WGTransCorp/Session3/LegallyBindingInstrumentTNCs_OBEs.pdf
http://www.bta.bg/en/c/DF/id/1731928