Committee on Mediterranean Neogene Stratigraphy. Proceedings of the 4th Session. On the scope and position of the Maeotic stage and on the Miocene-Pliocene boundary in the Ponto-Caspian Basin
A. Nevesskaja L et B. Iljina L, Committee on Mediterranean Neogene Stratigraphy. Proceedings of the 4th Session. On the scope and position of the Maeotic stage and on the Miocene-Pliocene boundary in the Ponto-Caspian Basin, Giornale di geologia , 35(04), 1969, pp. 27-39