Driessen, Clemens; Lorimer, Jamie. Back-breeding the aurochs: the Heck brothers, National Socialism and imagined geographies for nonhuman Lebensraum. Hitler’s Geographies. University of Chicago Press. 2016 [2022-07-19]. ISBN 9780226274423. (原始内容存档于2022-07-19).
Driessen, Clemens; Lorimer, Jamie. Back-breeding the aurochs: the Heck brothers, National Socialism and imagined geographies for nonhuman Lebensraum. Hitler’s Geographies. University of Chicago Press. 2016 [2022-07-19]. ISBN 9780226274423. (原始内容存档于2022-07-19).