by NIKOLAEVICH, VALERIJ K, NIKOLOV, STANIMIR G, LAZAREVICH, GENADIJ P, STOJCHEV, RADKO N, RUSEV, KOJCHO S, JAKOVLEVA, TAMARA P, MINEVA, DINKA I, GAVRILOVICH, PETR R, BASS, JURIJ P, PETROVNA, VERA I, MIKHOVA, SONJA M, SHEPELINA, LARISA N, VOLANOV, ANATOLIJ A, NANOVSKA, VIOLETA S, VASILAEVICH, EKTOV V, ALEKSANDROVICH, IGORA S, ZHELEV, GOSPODIN T, MITREV, KIRIL D, STAJKOV, IVAN T, MURATOVA, SVETLANA I, LEONIDOVICH, BORIS S, DONOVICH, ROSSIN V
Year of Publication 31.07.1997