Stanford, JK; Mayr, E (1940). "The Vernay Cutting Expedition to Northern Burma. Part I.". Ibis. 14 (4): 679–711. doi:10.1111/j.1474-919X.1940.tb00032.x.
Martens, J; Böhner, J; Hammerschmidt, K (2000). "Calls of the Jungle Crow (Corvus macrorhynchos s.l.) as a taxonomic character". Journal of Ornithology. 141 (3): 275–284. Bibcode:2000JOrni.141..275M. doi:10.1007/BF02462237.
Vaurie, Charles (1954). "Systematic notes on Palearctic birds. No. 5, Corvidae". American Museum Novitates (1668). hdl:2246/4961.
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Martens, J; Böhner, J; Hammerschmidt, K (2000). "Calls of the Jungle Crow (Corvus macrorhynchos s.l.) as a taxonomic character". Journal of Ornithology. 141 (3): 275–284. Bibcode:2000JOrni.141..275M. doi:10.1007/BF02462237.