Corbet, Gordon Barclay; Hill, John Edwards (1992). The mammals of the Indomalayan Region: a systematic review. Oxford: Oxford University Press. ISBN0-19-854693-9. OCLC25281229.
Erxleben, Johann Christian Polykarp (1777). Systema regni animalis per classes, ordines, genera, species, varietates cum synonymia et historia animalium. Classis I. Mammalia [Animal kingdom system by class, order, genus, species, varieties with synonyms and animals' history. Class I. Mammalia.] (in Latin). Vol. 42. Leipzig, Germany: Impensis Weygandianis. OCLC14843832.
Ryley, Kathleen V. (1913). "Scientific results from the mammals survey". Journal of the Bombay Natural History Society. 22. Mumbai, India: Bombay Natural History Society: 434–443. ISSN0006-6982. OCLC1536710.
Schreber, Johann Christian Daniel von (1792) [Chapter on The Squirrel first published in 1784]. "Der Springer" [The Squirrel]. Die Säugthiere in Abbildungen nach der Natur, mit Beschreibungen [The Mammals in illustrations after nature, with descriptions] (in German). Vol. 3. Erlangen: Wolfgang Walther. OCLC16860541.