Ayinapalli, Aiyappan (1982). The Personality of Kerala. Department of Publications, University of Kerala. p. 162. Consultado el 27 de julio de 2018. «A very powerful and warlike section of the Bants of Tulunad was known as Kola bari. It is reasonable to suggest that the Kola dynasty was part of the Kola lineages of Tulunad.»
Swai, B (1985). Studies in History. 1, ed. From Kolattunad to Chirakkal: British Merchant Capital and the Hinterland of Tellicherry. p. 87-110. doi:10.1177/025764308500100107.