Autor / AutorinAngelova, Maria;Artemchuk, Sergey ;Pencheva, Tania ;Atanassov, Emanouil ;Atanassov, Krassimir ;Atanassova, Lilija ;Dimitrov, Dimitar ;Ivanovska, Sofiya ;Whitlock, Paula A.;Atanassova, Vassia;Fidanova, Stefka ;Popchev, Ivan ;Bastin, Fabian ;Chountas, Panagiotis;Baumgartner, Oskar;Alba, Enrique;Carmi, Avishy;Dimov, Ivan;Dobrinkova, Nina ;Filipovic, Lado ;Kosina, Hans