P.B. Udgaonkar, « Political Institutions & Administration », Motilal Banarasidass Publishers, 1986 (ISBN978-81-20-82087-6) : « ... these popular courts are first mentioned by Yajnavalkya and then by Narada, Brishaspati, Somadeva and Sukra. These writers covered a period of about a thousand years, c. 250 to 1250 A.D., and they could not have mechanically referred to the popular courts if they were not actually functioning ... »