Nikita V. Zelenkov, Alexander V. Lavrov, Dmitry B. Startsev, Innessa A. Vislobokova, Alexey V. Lopatin: A giant early Pleistocene bird from eastern Europe: unexpected component of terrestrial faunas at the time of early Homo arrival Journal of Vertebrate Paleontology e1605521, 2019. doi:10.1080/02724634.2019.1605521
