John Caverhill, «Some Attempts to ascertain the utmost Extent of the Knowledge of the Ancients in the East Indies», Philosophical Transactions, vol.57, 1767, pp. 155-174.
Jean-Baptiste Bourguignon d' Anville, Eclaircissements géographiques sur la carte de l'Inde, Paris, Imprimerie Royale, 1753, pp.160-161; Jean Baptiste Bourguignon d' Anville, A Geographical Illustration of the Map of India, Translated by William Herbert, London, 1759, p.78; Atlas de d'Anville, 1786. Orbis Veteribus Notus