1. Pramathanath Bandyopadhyay, Internatinal Law and Custom in Ancient India, Ramanand Vidya Bhawan, Delhi – 55, 1982, PP, 10.11.
2. Arthasastra. BK III. Ch. I.
3. R. K. Choudhary, Op. uit. PP.97-98
4. Usha Mehta & Usha Thakkar Op. uit.PP. 18-19
5. Shamasastry, R., Evolution of Indian Polity, Calcutta, 1920, pp
6. Altekar, A.S., State and Government in Ancient India, Delhi, Motilal Banarsidass, 1949 (Re Print 1997), p. 35.