Majumdar, Ramesh Chandra (1967). The Delhi Sultanate. Bharatiya Vidya Bhavan. p. 69.
Loch, W. W. (1989). Dakhan History Musalman. New Delhi, India: Asian Educational Services. pp. 587: The conquest of the country was long imperfect, and we find Farishtah recording an attack made in A.D. 1340, by Muhammad Tughlak, the emperor of Delhi, on Nágnák, a Koli chief, who held the strong fort of Kondhána now Sinhgad. ISBN978-81-206-0467-4.
Kale, Rohit Pralhadrao (24 May 2018). Rajwata: Aavishkar Gad Killayacha. New Delhi, India: FSP Media Publications. pp. One of the most famous battles for Sinhgad was fought to recapture the fort by Tanaji Malusare, a Mard Maratha Koli and a general of Shivaji in March 1670.