Authors	Year	Title
Work, Mapes & Thompson	1988	A new prodromitid ammonoid genus from the Hannibal Shale (Lower Mississippian) of Missouri. Journal of Paleontology, 62 (5): 772-778, fig.1-5; Lawrence, Kansas.
Work	2002	The lower Mississippian (Kinderhookian) ammonoid Goniocyclus from the Hannibal Shale, Missouri. Journal of Paleontology, 76: 187-189, 3 fig., Lawrence,KS.
Work & Mapes	2002	Morphological and taxonomic clarification of the lower Mississippian (Kinderhookian) ammonoid genus Eoprodromites. Journal of Paleontology, 76: 910-912, 2 fig., Lawrence, KS.