1. T.J. Barrett(1979 ) Origin of bedded cherts overlying ophiolites in the Italian North Apennines, and implications of the ophiolite-pelagic sediment sequences for seafloor processes, Unpublished Ph.D. Thesis . Oxford University. 419 pp.
2. The Pb isotopic composition of Jurassic cherts overlying ophiolites in the North Apennines, Italy