Taras P. Sipko: European bison in Russia – past, present and future. In: European Bison Conservation Newsletter. Band 2, 2009, S. 148–159. Online-PDFΑρχειοθετήθηκε 2012-02-01 στο Wayback Machine.
Taras P. Sipko: European bison in Russia – past, present and future. In: European Bison Conservation Newsletter. Band 2, 2009, S. 148–159. Online-PDFΑρχειοθετήθηκε 2012-02-01 στο Wayback Machine.