Kaliciuk, J., Wysocki, D., Bereszyński, A., Tracz, M., & Tracz, M. (2009). New free-range European bison herd in Zachodniopomorskie voivodship one year after creation. European Bison Conservation Newsletter, 2, 142–147. Retrieved from http://ojs.wisent.org/index.php/czasopismo/article/view/183