Grogan, E.D. & Lund, R. (2009)
Two new iniopterygians (Chondrichthyes) from the Mississippian (Serpukhovian) Bear Gulch Limestone of Montana with evidence of a new form of chondrichthyan neurocranium. Acta Zoologica(Stockholm), 90(1), 134–151
DOI: 10.1111/j.1463-6395.2008.00371.x