C. van Puyvelde,
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Dictionnaire de la Bible: Supplément, vol. 6, pp. 834–884, 1960.
A. de Halleux,
“Vingt ans d'étude critique des églises syriaques”, in
The Christian East, its institutions & its thought: a critical reflection; papers of the International Scholary [sic] Congress for the 75th Anniversary of the Pontifical Oriental Institute, Rome, 30 May-5 June 1993,
R. F. Taft, Ed. Rome: Oriental Institute, 1996, pp. 145–179.