Fostowicz-Frelik, Łucja; Frelik, Grzegorz; Gasparik, Mihály (октобар 2010). „Morphological phylogeny of pikas (Lagomorpha: Ochotona), with a description of a new species from the Pliocene/Pleistocene transition of Hungary”. Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences. 159: 97—117. JSTOR41446115. doi:10.1635/053.159.0107.
Guthrie, R.D.; Matthews, John V. Jr. (1971). „The Cape Deceit fauna—Early pleistocene mammalian assemblage from the Alaskan arctic”. Quaternary Research. 1 (4): 474—510. doi:10.1016/0033-5894(71)90060-3.
Erbajeva, Margarita A.; Mead, Jim I.; Swift, Sandra L. (2003). „Evolution and development of Asian and North American ochotonids”(PDF). Occasional Papers in Earth Sciences No. 5. Palaeontology Program Government of the Yukon: 33—34. Архивирано из оригинала(PDF) 31. 3. 2014. г. Приступљено 13. 4. 2014. „3rd INTERNATIONAL MAMMOTH CONFERENCE, 2003: PROGRAM AND ABSTRACTS, Edited by John E. Storer”
Rekovets, Leonid (2003). „Mammoth (Mammuthus primigenius) in the periglacial faunas of Ukraine”(PDF). Occasional Papers in Earth Sciences No. 5. Palaeontology Program Government of the Yukon: 130—131. Архивирано из оригинала(PDF) 31. 3. 2014. г. Приступљено 13. 4. 2014. „3rd INTERNATIONAL MAMMOTH CONFERENCE, 2003: PROGRAM AND ABSTRACTS, Edited by John E. Storer”
Fostowicz-Frelik, Łucja; Frelik, Grzegorz; Gasparik, Mihály (октобар 2010). „Morphological phylogeny of pikas (Lagomorpha: Ochotona), with a description of a new species from the Pliocene/Pleistocene transition of Hungary”. Proceedings of the Academy of Natural Sciences of Philadelphia. Academy of Natural Sciences. 159: 97—117. JSTOR41446115. doi:10.1635/053.159.0107.
Erbajeva, Margarita A.; Mead, Jim I.; Swift, Sandra L. (2003). „Evolution and development of Asian and North American ochotonids”(PDF). Occasional Papers in Earth Sciences No. 5. Palaeontology Program Government of the Yukon: 33—34. Архивирано из оригинала(PDF) 31. 3. 2014. г. Приступљено 13. 4. 2014. „3rd INTERNATIONAL MAMMOTH CONFERENCE, 2003: PROGRAM AND ABSTRACTS, Edited by John E. Storer”
Rekovets, Leonid (2003). „Mammoth (Mammuthus primigenius) in the periglacial faunas of Ukraine”(PDF). Occasional Papers in Earth Sciences No. 5. Palaeontology Program Government of the Yukon: 130—131. Архивирано из оригинала(PDF) 31. 3. 2014. г. Приступљено 13. 4. 2014. „3rd INTERNATIONAL MAMMOTH CONFERENCE, 2003: PROGRAM AND ABSTRACTS, Edited by John E. Storer”
Hoffman, R.S.; Smith, A.T. . „Order Lagomorpha”. (3rd изд.). Johns Hopkins University Press. 2005. стр. 185—193. ISBN978-0-8018-8221-0. OCLC62265494.Недостаје или је празан параметар |title= (помоћ). In: Wilson, D.E.; Reeder, D.M. Mammal Species of the World: A Taxonomic and Geographic Reference .