Mikhail Savov
Razvitie na vŭnshnata tŭrgovii︠a︡ mezhdu NRB i SSSR v uslovii︠a︡ta na integratsii︠a︡ta- Razvitie na vŭnshnata tŭrgovii︠a︡ mezhdu NRB i SSSR v uslovii︠a︡ta na integrat︠s︡ii︠a︡ta
- SIV--dostizhenii︠a︡ i perspektivi
- Sot͡s︡ialisticheskata ikonomicheska integrat͡s︡ii͡a︡--vŭnshnotŭrgovski i t͡s︡enovi problemi
- Sovet ėkonomicheskoĭ vzaimopomoshchi i Narodnai͡a︡ respublika Bolgarii͡a︡
- The Council for Mutual Economic Assistance and the People's Republic of Bulgaria
- T︠S︡enoobrazuvaeto na svetovnii︠a︡ sot︠s︡ialisticheski pazar
- Vneshni͡a︡i͡a︡ torgovli͡a︡ mezhdu NRB i SSSR v uslovii͡a︡kh ėkonomicheskoĭ integrat͡s︡ii