C. Minakshi; Administration and Social Life under the Pallavas, Madras, 1938, 1977; and T.V. Mahalingam; South Indian Polity, University of Madras, 1967.
Discussion of this connectivity found in Thomas R. Trautmann, ‘Traditions of Statecraft in Ancient India’, in R.J. Moore, (ed.) Traditions and Politics in South Asia, New Delhi, 1979, p.102