	Authors	Year	Title
	Boardman, Work & Mapes	1994	Revision of the family Shumarditidae Plummer & Scott, 1937. Kansas Geological Survey Bulletin, 232: 48-56, figs.23-26.
	Popov	1992	Gzhelskie ammonoidei Srednei Azii (Karachatyr). St. Petersburg State University, Voprosy Paleontologii, 10: 52-62, 1 text-fig., 1 pl.