aftalen mellem Folkerepublikken Bulgarien og Folkerepublikken Jugoslavien om gensidig retshjælp, undertegnet i Sofia den 23. marts 1956, og som fortsat gælder mellem Bulgarien og Slovenien
the Agreement between the People's Republic of Bulgaria and the Federative People's Republic of Yugoslavia on Mutual Legal Assistance, signed at Sofia on 23 March 1956, still in force between Bulgaria and Slovenia,