↑ Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore: Johns Hopkins University Press. xiii + 296 pp. ISBN978-1-4214-0135-5. ("Przewalski", p. 212).
↑ See, e.g. Nikolay Przhevalsky, "Mongolia, The Tangut Country and the Solitudes of Northern Tibet", two volumes, translated by E. Delmar Morgan with introduction and notes by Colonel Henry Yule (London: Sampson Low, Marston, Searle & Rivington, 1876, vol. 2, p. 24.
↑ David Schimmelpenninck Van Der Oye, "Toward the Rising Sun: Russian Ideologies of Empire and the Path to War with Japan" (DeKalb, Il: Northern Illinois University Press, 2001), p. 34
