	Authors	Year	Title
	Dvorák, Friáková & Kullmann	1989	Influence of volcanism on upper Devonian black limestone and shale deposition, Czechoslovakia. In: Devonian of the World (McMillan,M.J., Embry,A.F. & Glass,D.J. (eds.),Canadian Society of Petroleum Geologists,Memoir 14: 393-397,3 figs., Calgary.