Malekandathil, P. “Ships, Navigation and Maritime Exchange Centres of Kerala: Channels of Civilizational Contacts (100 BC to 1500 AD)”. Summerhill: IIAS Review, vol. 10, no. 1-2, Sept. 2020, pp. 42-55, http://14.139.58.200/ojs/index.php/summerhill/article/view/1019.