1. Ager, D. V. A. 1965. Mesozoic and Cenozoic Rhynchonellacea. In Treatise on Invertebrate Paleontology, Pt. H Brachiopoda 2, ed. R. C. Moore, H597–H632. Lawrence: The Geological Society of America and the University of Kansas Press.
2. Ager, D.V.A. 1967. Brachiopod palaeoecology. Earth Science Review 3: 157–179.
3. Ahmad, F. 2002a. Middle Jurassic brachiopods associations from Wadi Shaban, northwest Jordan. Yarmouk University 11: 745–762.
4. Ahmad, F. 2002b. On the Bajocian-Callovian macrofauna age of the Jurassic rocks of northwestern Jordan (Research Note), Dirasat. Pure Sciences 29: 47–52.
5. Alexander, R.R. 1999a. Function of external skeletal characteristics of articulate brachiopods. In Functional morphology of the invertebrate skeleton, ed. E. Savazzi, 371–398. New York: John Wiley and Sons.