IZVESTIYA na MATEMATICHESKIYA INSTITUT.  BULGARSKA AKADEMIYA na NAUKITE.
Sofia,1(1953/54)-15(1974).
-Izv.Mat.Inst.Bulgar.Akad.Nauk
---> SG-1
4(1960)-5(1962); 9(1966)-15(1974). 
lac. 4(1960) n.1; 5(1961) n.2 
ritorna alla lista Publisher : Bulgarian Academy of Sciences
formerly
continued as
-Bulletin de Institut de Mathematiques. Academie Bulgare des Sciences. Sect. de Mathematiques et de Physique.[1(1903)-48(1952)] Serdica