Bŭlgarska akademii︠a︡ na naukite

Network information processing systems : proceedings of the IFIP TC6/TC8 Open Symposium on Network Information Processing Systems, Sofia, Bulgaria, 9-13 May, 1988

Ifip Tc, Kiril L. Boi︠a︡nov, Rasko Angelinov, 1989 .

Earthquake engineering : Proceedings of the Third European Symposium on Earthquake Engineering, Sofia-Bulgaria, September 14-17, 1970

Bŭlgarska akademii︠a︡ na naukite, 1971 .

Bulgarian Academy of Sciences reference book 1969

Bŭlgarska akademii︠a︡ na naukite, Georgi Brankov, 1969 .

Bulgarian Chemical Communications

Bŭlgarska akademii︠a︡ na naukite, 1992 .