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Krogulevich, R. E. 1976. Chromosome numbers of plant species from the Tunkinsky Alpes (East Sayan). News Sib. Depart. Acad. Sci. USSR, Ser. Biol. 15(3): 46–52.
ZHUKOVA, P. G. 1967. Karyology of some plants, cultivated in the Arctic-Alpine Botanical Garden. (In Russian). In N. A. Avrorin (ed.): Plantarum in Zonam Polarem Transportatio. II. Leningrad 1967, pp. 139-149.