pid type title authors mentors source_title published_date url doi isbn issn eissn hrstud:1820 dissertation "ONTOLOGIJA UMJETNOSTI IVANA FOCHTA" "Škrbić, Tomislav" hrstud:1821 dissertation "Platonov Simpozij" "Podrug, Berislav" hrstud:1832 dissertation "NOŨS U PLATONOVU FILOZOFIRANJU" "Šegedin, Petar"