For the study of the history of missions within the series Historia missionum Ordinis Fratrum Minorum he was responsible for the 4th Volume: Regiones Proximi Orientis et Paeninsulae Balcanicae in 1974.
Za povijest misija u nizu Historia missionum Ordinis Fratrum Minorum priložio je 4. svezak: Regiones Proximi Orientis et Paeninsulae Balcanicae god.