Don E. Wilson & DeeAnn M. Reeder (Hrsg.): Ochotona pallasi in Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed).
doi.org
Andrey A. Lissovsky, Svetlana P. Yatsentyuk, Deyan Ge: Phylogeny and taxonomic reassessment of pikas Ochotona pallasii and O. argentata (Mammalia, Lagomorpha). Zoologica Scripta 45 (6), November 2016; S. 583–594. doi:10.1111/zsc.12180
google.de
books.google.de
Beolens, Watkins & Grayson: The Eponym Dictionary of Mammals. JHU Press, 2009, S.305 (Pallas).