	Authors	Year	Title
	Titus	1999	Ammonoid biostratigraphy of the Barnett Shale (late Mississippian), Texas, USA. In: Rozanov,A.Yu. & Shevyrev,A.A. (eds.), Fossil cephalopods: Recent advances in their study, Ross.Akad.Nauk,Paleont.Inst.: 155-168, 6 figs., Moskva