Thomas A. Carlson (eds.), "Scher, Addai" in The Gorgias Encyclopedic Dictionary of the Syriac Heritage last modified September 4, 2013, http://syriaca.org/bibl/486 G. A. Kiraz S. P. Brock Scher, Addai Sebastian P. Brock Aaron M. Butts George A. Kiraz Lucas Van Rompay The Gorgias Encyclopedic Dictionary of the Syriac Heritage http://syriaca.org/bibl/1 Gorgias Press Piscataway, NJ 2011 361-362 http://syriaca.org/bibl/486