1. A chromosome study of the pika, Ochotona princeps;Adams;Mammalian Chromosome Newsletters,1971
2. Isolation and characterization of DNA from fixed cells and tissues;Arrighi;Experimental Cell Research,1968
3. The chromosomes of Royle’s pika, Ochotona roylei, (Mammalia, Lagomorpha);Capanna;Rendiconti Lincei,1991
4. A colchicines hypotonic citrate squash sequence for mammalian chromosomes;Ford;Stain Technology,1956
5. The species status of a new pika (Ochotona hoffmanni Formozov et al., 1996) and its inclusion in the list of Russian fauna;Formozov;Byulleten’ Moskovskogo Obshchestva Ispytateley Prirody,1999