'Everywhere within Beloved-of-the-Gods, King Piyadasi's domain, and among the people beyond the borders, the Cholas, the Pandyas, the Satyaputras, the Keralaputras, as far as Tamraparni...' —"Ashoka's second minor rock edict". Colorado State University. Retrieved 15 November 2006.
doi.org
Hellmann-Rajanayagam, Dagmar (1994). "Tamils and the meaning of history". Contemporary South Asia. 3 (1). Routledge: 3–23. doi:10.1080/09584939408719724.
keralahistory.ac.in
'There were three levels of redistribution corresponding to the three categories of chieftains, namely: the Ventar, Velir and Kilar in descending order. Ventar were the chieftains of the three major lineages, viz Cera, Cola and Pandya. Velir were mostly hill chieftains, while Kilar were the headmen of settlements...' —"Perspectives on Kerala History". P.J.Cherian (Ed). Kerala Council for Historical Research. Archived from the original on 26 August 2006. Retrieved 15 November 2006.
mssu.edu
"Hathigumpha Inscription". Epigraphia Indica, Vol. XX (1929–1930). Delhi, 1933, pp 86–89. Missouri Southern State University. Archived from the original on 17 November 2006. Retrieved 15 November 2006.
'There were three levels of redistribution corresponding to the three categories of chieftains, namely: the Ventar, Velir and Kilar in descending order. Ventar were the chieftains of the three major lineages, viz Cera, Cola and Pandya. Velir were mostly hill chieftains, while Kilar were the headmen of settlements...' —"Perspectives on Kerala History". P.J.Cherian (Ed). Kerala Council for Historical Research. Archived from the original on 26 August 2006. Retrieved 15 November 2006.
"Hathigumpha Inscription". Epigraphia Indica, Vol. XX (1929–1930). Delhi, 1933, pp 86–89. Missouri Southern State University. Archived from the original on 17 November 2006. Retrieved 15 November 2006.
