The Vietnamese archaeologist and historian Hà Văn Tấn has written that at the present stage of knowledge, it was impossible to demonstrate the existence of a Funan culture, widely spread from the Mekong Delta through the Chao Praya delta to Burma, with Óc Eo as the typical representative: the presence of similar artefacts such as jewelry and seals from sites in those areas was simply the result of trade and exchange, while each of the sites bore the signs of their own separate cultural development. He supported the view of Claude Jacques that, in view of the complete lack of any Khmer records relating to a kingdom by the name of Funan, use of this name should be abandoned in favour of the names, such as "Aninditapura", "Bhavapura", "Shresthapura" and "Vyadhapura", which are known from inscriptions to have been used at the time for cities in the region and provide a more accurate idea of the true geography of the ancient Khmer territory. Hà Văn Tấn argued that, from the late neolithic or early metal age, Óc Eo gradually emerged as an economic and cultural centre of the Mekong Delta and, with an important position on the Southeast Asian sea routes, became a meeting place for craftsmen and traders, which provided adequate conditions for urbanization, receiving foreign influences, notably from India, which in turn stimulated internal development.