Source: Vrindavan Today of 2012-12-2

• http://ignca.nic.in/nl001702.htm – article on Mathura
• Excavations at Sonkh 2500 years of a town in Mathura District
  Herbert Härtel  – FOC.L /696271 
• Occupation thought to have been from 8th century BCE to 19th century CE. Stratification largely based on coin evidence.
• Second temple thought to be sanctuary for Naga cult.