by Esipko E.A.[SU], Khadzhiev S.N.[SU], Prokof'ev V.P.[SU], Atanasov A.[BG], Agaronov V.A.[SU], Martynenko A.G.[SU], P"rvanev L.[BG], Khristov V.[BG]
Year of Publication 27.03.1996

by ATANASOV,GEORGI A.,BG, BOTEV,PLAMEN G.,BG
Year of Publication 15.06.1989

by ATANASOV,ATANAS A.,BG, DRAGANCHEV,PET'R T.,BG
Year of Publication 15.12.1988

by DRAGANOV,NIKOLA D.,BG, TODOROV,TODOR Z.,BG, ATANASOV,RUMEN A.,BG
Year of Publication 15.02.1989

by PAVLOVA,LILJANA P.,BG, LEPKOVA,DOBRINKA P.,BG, ATANASOV,GEORGI A.,BG
Year of Publication 15.04.1988

by MIRCEVA VERA V.,BG, ATANASOV NIKOLAJ A.,BG, LJUTOV LJUDMIL G.,BG, STEFANOV STEFAN R.,BG
Year of Publication 13.12.1989

by TRENEV,VASIL D.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG
Year of Publication 15.06.1988

by ATANASOV,ATANAS V.,BG, DAMJANOV,ZHELJAZKO K.,BG, PASHOV,GEORGI HH.,BG, MARINOV,MITKO G.,BG, ATANASOV,VASIL A.,BG, BOZHILOV,KRASIMIR N.,BG
Year of Publication 16.01.1989

by TRENEV,VASIL D.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, DIMITROV,RANGEL G.,BG, MAVROV,ZAKHARI V.,BG
Year of Publication 16.05.1988

by MAKEDONSKI,BORIS G.,BG, BLSOV,JANAKI R.,BG, ALIPIJEV,LJUBOMIR P.,BG, ATANASOV,CHARALAMPI A.,BG, TODOROV,NEDELCO CH.,BG
Year of Publication 15.04.1988

by DIMITROV,IVAN D.,BG, GANEV,GANCHO M.,BG, SAVOV,KRASIMIR A.,BG, ATANASOV,PET'R P.,BG, ATANASOV,PET'R A.,BG, ILIEV,BOJAN K.,BG
Year of Publication 15.03.1988

by TRENEV,VASIL D.,BG, KACAROV,KHRISTO B.,BG, KRUMOV,ASEN V.,BG, CANKOV,GEORGI L.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, ATANASOV,ZHIVKO S.,BG
Year of Publication 15.06.1989

by PETKOVA,ILIANA P.,BG, STANILOV,KR'STJU A.,BG, ATANASOV,RUMEN A.,BG, GEORGIEV,GEORGI A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, POPOV,LAZAR V.,BG
Year of Publication 15.05.1989

by TRENEV,VASIL D.,BG, DZHONEV,ILIJA K.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, DIMITROV,RANGEL G.,BG, MAVROV,ZAKHARI V.,BG
Year of Publication 15.06.1988

by TRENEV,VASIL D.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, POPOV,LAZAR V.,BG, DIMITROV,RANGEL G.,BG, MAVROV,ZAKHARI V.,BG
Year of Publication 16.05.1988

by TRENEV,VASIL D.,BG, PETKOV,NIKOLAJJ M.,BG, STANILOV,KR'STJU A.,BG, GEORGIEV,GEORGI A.,BG, ATANASOV,RUMEN A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, DIMITROV,RANGEL G.,BG
Year of Publication 15.03.1988

by TRENEV,VASIL D.,BG, ATANASOV,RUMEN A.,BG, GEORGIEV,GEORGI A.,BG, STANILOV,KR'ST'O A.,BG, POPOV,ENCHO N.,BG, APOSTOLOV,RUMEN K.,BG, SOGINDOLSKI,IVAN K.,BG, DIMITROV,RANGEL G.,BG
Year of Publication 15.02.1988

by MAKEDONSKI,BORIS G.,BG, PETROV,PETR K.,BG, ATANASOV,CHARALAMPI A.,BG, TODOROV,NEDELCO CH.,BG
Year of Publication 25.11.1987

by MAKEDONSKI,BORIS G.,BG, ALIPIEV,LJUBOMIR P.,BG, ATANASOV,CHARALAMPI A.,BG, TODOROV,NEDELCO CH.,BG, NIKOLOV,BALENTIN N.,BG
Year of Publication 25.11.1987