English: Holocene & Historic range map of the two European bison species (Bison bonasus and Bison priscus): Holocene (B. priscus only) in light green; B. bonasus range in the high middle ages in dark green, relict B. bonasus populations in the 20th century in red

References:

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• Markova, A.K., et al., Changes in the Eurasian distribution of the musk ox (Ovibos moschatus) and the extinct bison (Bison priscus) during the last 50 ka BP, Quaternary International (2015), https://dx.doi.org/10.1016/j.quaint.2015.01.02 https://www.researchgate.net/publication/275412500_Changes_in_the_Eurasian_distribution_of_the_musk_ox_Ovibos_moschatus_and_the_extinct_bison_Bison_priscus_during_the_last_50_ka_BP
• M. Tokarska, C. Pertoldi, R. Kowalczuk, K. Perzanowski. Genetic status of the European bison Bison bonasus after extinction in the wild and subsequent recovery. Mammal Review, January 2011.
• Bunzel-Drüke, Finck, Kämmer, Luick, Reisinger, Riecken, Riedl, Scharf & Zimball: "Wilde Weiden: Praxisleitfaden für Ganzjahresbeweidung in Naturschutz und Landschaftsentwicklung. Arbeitsgemeinschaft Biologischer Umweltschutz im Kreis Soest e.V. (ABU), 2008. ISBN 978-3-00-024385-1
• Sipko, T., P. (2009). European bison in Russia – past, present and future. European Bison Conservation Newsletter Vol 2, pp: 148–159