Carbon and oxygen isotopic composition of the Middle Miocene Badenian gypsum-associated limestones of West Ukraine - Peryt, T. M. (Polish Geological Institute, National Research Institute) ; Durakiewicz, T. (Los Alamos National Laboratory) ; Peryt, D. (Polish Academy of Sciences. Institute of Paleobiology) ; Poberezhskyy, A. (National Academy of Sciences of Ukraine. Institute of Geology and Geochemistry of Combustible Minerals)