[2] At the Faculty of Humanities and Social Sciences, University of Zagreb, he received a degree in Classical Philology in 1954.
[2] As a stipendist of the Greek government, he visited Athens in 1956-57, and in 1958 he was elected as an assistant at the Department for Comparative Indo-European Grammar at the Faculty of Humanities and Social Sciences in Zagreb.
[2] In 1959, he received his Ph.D. with the thesis Pitanje jedinstva indoeuropske glagolske fleksije ('The question of unity of Indo-European verbal flexion').
Some aspects of his work meet criticism, primarily his puristic approach to the linguistic terminology,[3] the primordialist view of nations,[4][5][6] and subjectivity in articles on language policy.
[8][9][10][11] Katičić's scholarly contributions which consists of more than 150 titles (books and papers) can be divided in five fields: