E.A.W. Budge, “On a Fragment of a Coptic Version of Saint Ephraim’s Discourse on the Transfiguration of Our Lord,” Proceedings of the Society of Biblical Archaeology 9 (1886/1887) 317-329  (this is CPG 3939, In transfigurationem domini; the homily belongs to Isaac of Antioch, but it circulated as well under the name of Ephraem or John Chrysostom);

I. Guidi, “La traduzione copta di un omelia di S. Efrem,” Bessarione 2 (1902/1903) 1-21 (this is CPG 3952, In mulierem peccatricem; in Greek it was attributed also to John Chrysostom);

M. van Esbroeck, “Une homélie inédite éphrémienne sur le bon larron en grec, géorgien et arabe,” Analecta Bollandiana 101 (1983) 327-362 (the Arabic translation might indicate a lost, or not yet identified, Coptic version);

E. Beck, D. Hemmerdinger-Iliadou, J. Kirchmeyer, “Ephrem le Syrien (saint),” in Dictionnaire de spiritualité vol. 4 (Paris: Beauchesne, 1960-61) coll. 788-822 (very important article on Ephraem Graecus, but too laconic on the Coptic versions).