"Following discoveries at Ai-Khanum, excavations at Tapa Shotor, Hadda, produced evidence to indicate that Gandharan art descended directly from Hellenised Bactrian art. It is quite clear from the clay figure finds in particular , that either Bactrian artist from the north were placed at the service of Buddhism, or local artists, fully conversant with the style and traditions of Hellenistic art , were the creators of these art objects" in Frank Raymond Allchin: Gandharan Art in Context: East-west Exchanges at the Crossroads of Asia. Published for the Ancient India and Iran Trust, Cambridge by Regency Publications, 1997, ISBN 978-81-86030-48-6, S.19 (englisch, google.com).