Nathan P. Gibson (eds.), "Patrologia Syriaca" in last modified June 26, 2014, http://syriaca.org/bibl/641 Ignatius Ortiz de Urbina Patrologia Syriaca Altera editio emendata et aucta Pont. Institutum Orientalium Studiorum Romae 1965 http://syriaca.org/bibl/641