Angelov, Mihail E; Ivanova, Valentina D; Wittenberg, Michael F; Stoyanov, Plamen S; Mladenov, Rumen D; Mladenova, Tsvetelina R; Gyuzeleva, Donika P; Radoukova, Tzenka I; Todorov, Krasimir T; Gechev, Tsanko S

Angelov, Mihail; Ivanova, Valentina; Stoyanov, Plamen; Mladenov, Rumen; Mladenova, Tsvetelina; Gyuzeleva, Donika; Zhelyazkova, Simona; Radoukova, Tzenka; Todorov, Krasimir; Bogdanova, Stefka; Ivanova, Aleksandra; Wittenberg, Michael; Petrov, Veselin; Gechev, Tsanko

Radoukova, Tzenka; Semerdjieva, Ivanka; Zheljazkov, Valtcho D

Semerdjieva, Ivanka; Cantrell, Charles L; Zheljazkov, Valtcho D; Radoukova, Tzenka; Koleva-Valkova, Lyubka H; Astatkie, Tess; Kačániová, Miroslava; Borisova, Daniela

Semerdjieva, Ivanka; Zheljazkov, Valtcho D; Dincheva, Ivayla; Radoukova, Tzenka; Astatkie, Tess; Maneva, Vasilina; Atanasova, Dina; Fidan, Hafize; Stankov, Stanko; Stoyanova, Albena

Zheljazkov, Valtcho D; Cantrell, Charles L; Semerdjieva, Ivanka; Radoukova, Tzenka; Stoyanova, Albena; Maneva, Vasilina; Kačániová, Miroslava; Astatkie, Tess; Borisova, Daniela; Dincheva, Ivayla; Salamon, Ivan

Semerdjieva, Ivanka; Zheljazkov, Valtcho D; Radoukova, Tzenka; Dincheva, Ivayla; Piperkova, Neshka; Maneva, Vasilina; Astatkie, Tess; Kačániová, Miroslava

Stankov, Stanko; Fidan, Hafize; Petkova, Zhana; Stoyanova, Magdalena; Petkova, Nadezhda; Stoyanova, Albena; Semerdjieva, Ivanka; Radoukova, Tzenka; Zheljazkov, Valtcho D

Gecheva, Gana; Mollov, Ivelin; Yahubyan, Galina; Gozmanova, Mariyana; Apostolova, Elena; Vasileva, Tonka; Nikolova, Mariana; Dimitrova-Dyulgerova, Ivanka; Radoukova, Tzenka

B Semerdjieva, Ivanka; Shiwakoti, Santosh; L Cantrell, Charles; D Zheljazkov, Valtcho; Astatkie, Tess; Schlegel, Vicki; Radoukova, Tzenka