Committee on Mediterranean Neogene Stratigraphy. Proceedings of the 4th Session. Planktonic Foraminifera of the Tortonian s.l. (in a broader sense) of the central Paratethys
I. Cicha et al., Committee on Mediterranean Neogene Stratigraphy. Proceedings of the 4th Session. Planktonic Foraminifera of the Tortonian s.l. (in a broader sense) of the central Paratethys, Giornale di geologia , 35(02), 1968, pp. 411-444