Łucja Fostowicz-Frelik: A new species of Pliocene Prolagus (Lagomorpha: Ochotonidae) from Poland is the northernmost record of the genus. In: Journal of Vertebrate Paleontology. Bd. 30, Nr. 2, 2010, ISSN0272-4634, S. 609–612, JSTOR:40666181.
Łucja Fostowicz-Frelik: A new species of Pliocene Prolagus (Lagomorpha: Ochotonidae) from Poland is the northernmost record of the genus. In: Journal of Vertebrate Paleontology. Bd. 30, Nr. 2, 2010, ISSN0272-4634, S. 609–612, JSTOR:40666181.