Sources:
- Howard Crosby Butler: Early Churches in Syria. Fourth to Seventh Centuries. Princeton University Press, Princeton 1929, p. 128-129
- idem eds., Syria: publications of the Princeton University Archaeological Expeditions to Syria in 1904 - 5 and 1909 (Div. 2, Sect. B ; 5) — 1912, p. 235-236
- idem eds.::Syria: publications of the Princeton University Archaeological Expeditions to Syria in 1904 - 5 and 1909 (Div. 2, Sect. B ; 6) — 1920, map