S. P. Brock,
“Bar Shabba, Mar Shabbay, First Bishop of Merv”, in
Syrisches Christentum weltweit: Festschrift W. Hage,
M. Tamcke, Schwaigert, W., and Schlarb, E., Eds. Munster: LIT Verlag, 1995, pp. 190–201.
S. P. Brock,
“Some Prominent Themes in the Writings of the Syrian Mystics of the 7th and 8th Century AD”, in
Gotteserlebnis und Gotteslehre: Christliche und islamische Mystik im Orient,
M. Tamcke, Ed. Wiesbaden: Harrassowitz, 2010, pp. 49–59.