Gregory C. Ference (2000). "Frank, Josip". In Richard Frucht (ed.). Encyclopedia of Eastern Europe: From the Congress of Vienna to the Fall of Communism. New York & London: Garland Publishing. pp. 276–277. Archived from the original on 2008-03-17. Retrieved 2017-09-02.
web.archive.org
Gregory C. Ference (2000). "Frank, Josip". In Richard Frucht (ed.). Encyclopedia of Eastern Europe: From the Congress of Vienna to the Fall of Communism. New York & London: Garland Publishing. pp. 276–277. Archived from the original on 2008-03-17. Retrieved 2017-09-02.