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Madelaine Böhme, Nikolai Spassov, Martin Ebner, Denis Geraads, Latinka Hristova, Uwe Kirscher, Sabine Kötter, Ulf Linnemann, Jérôme Prieto, Socrates Roussiakis, George Theodorou, Gregor Uhlig, Michael Winklhofer: Messinian age and savannah environment of the possible hominin Graecopithecus from Europe. In: PLOS ONE. Jahrgang 12, Nr. 5, 2017, e0177347, doi:10.1371/journal.pone.0177347, ISSN1932-6203 (englisch).