A recently published in PLOS ONE study by the Mammal Research Institute staff, shows isotopic analysis of the oldest preserved in Europe bones of bison Bison bonasus. The article aroused the interest of journalists from natural science magazine Biosphere which presents the latest wildlife science discoveries.
The article in Biosphere is available here: http://www.biosphereonline.com/2015/03/06/european-bison-king-forest-refugee-species/