Fischer, J. & Wittry, J. (2014)
The unique Pennsylvanian chondrichthyan multi-taxa nursery of Mazon Creek. Absract.
Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften, 85: 121
Wittry, J. (2018)
Illinois - Fossil Shark Egg Cases of the Mazon Creek Region.
The Field Museum, Chicago, IL 60605 USA