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2014. Zdeněk Vašíček; Dragoman Rabrenović; Petr Skupien; Vladan J. Radulović; Barbara V. Radulović; Ivana Mojsić "Ammonites (Phylloceratina, Lytoceratina and Ancyloceratina) and organic-walled dinoflagellate cysts from the Late Barremian in Boljetin, eastern Serbia". Cretaceous Research. 47: 140–159 Source - Edit
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