Berta Kalaora
Borbite na sofiĭskite rabotnitsi protiv fashizma i kapitalizma 1939-1944- Bŭlgarskite profesionalni sŭi︠u︡zi, 1904-1984
- Chelnii︠a︡t opit sot︠s︡ialisticheskoto sŭrevnovanie
- Dragoĭ Kodzheĭkov
- Georgi Dimitrov and the trade union movement
- Georgi Dimitrov i profsui︠u︡znoto dvizhenie
- Georgi Dimitrov, an eminent functionary of the Bulgarian and the international trade union movement
- Georgi Dimitrov, profsŭi︠u︡zite i nashata sŭvremennost
- History of the Bulgarian Trade unions
- Ikonomicheskata funkt︠s︡ii︠a︡ na profsŭi︠u︡zite
- Istorii︠a︡ na mezhdunarodnoto rabotnichesko i profsŭi︠u︡zno dvizhenie
- Materiali po istoriia na profsuiuznoto dvizhenie v Bulgariia