↑ Jan Romgard Questions of Ancient Human Settlements in Xinjiang and the Early Silk Road Trade, with an Overview of the Silk Road Research Institutions and Scholars in Beijing, Gansu, and Xinjiang (инг.) // Sino-Platonic Papers (инг.)баш. : journal. — 2008. Архивировано из первоисточника 6 февраль 2012.