↑ Raychaudhuri, edited by Tapan; Habib, Irfan (1981). The Cambridge economic history of India (1. publ. ed.). Cambridge [Eng.]: Cambridge University Press. p. 106. ISBN9780521226929.CS1 maint: extra text: authors list (link)
↑ Rao, P. Raghunanda (1989). Indian heritage and culture (1st ed.). New Delhi: Sterling Publishers Private Unlimited. p. 38. ISBN9788120709300.
