Tharoor, Kanishk: Lost cities #5: how the magnificent city of Merv was razed – and never recovered. The Guardian , 2016 [2021. április 29-i dátummal az eredetiből archiválva]. (Hozzáférés: 2020. július 26.) „Once the world's biggest city, the Silk Road metropolis of Merv in modern Turkmenistan destroyed by Genghis Khan's son and the Mongols in AD1221 with an estimated 700,000 deaths.”
Tharoor, Kanishk: Lost cities #5: how the magnificent city of Merv was razed – and never recovered. The Guardian , 2016 [2021. április 29-i dátummal az eredetiből archiválva]. (Hozzáférés: 2020. július 26.) „Once the world's biggest city, the Silk Road metropolis of Merv in modern Turkmenistan destroyed by Genghis Khan's son and the Mongols in AD1221 with an estimated 700,000 deaths.”
