Aitken, Bill (2001). Speaking Stones: World Cultural Heritage Sites in India. Eicher Goodearth Limited. p. 25. ISBN81-87780-00-2. Consultado el 25 de mayo de 2009. «“Whatever the cause of Tughalqabad’s demise, Ghiyasuddin’s successor Mohammed Bin Tughlaq returned to the original Rajput site. However, the Mongol threatened again and the new ruler decided to wall Qila Rai Pihora, Siri and the suburbs between them to build his Jahanpnah or “Refuge of the World”».
Y.D.Sharma (2001). «Delhi and its Neighbourhood». Siri Fort & A- Siris (New Delhi: Archaeological Survey of India). pp. 25 & 73. Archivado desde el original el 31 de agosto de 2005. Consultado el 24 de abril de 2009.
Lucy Peck (2005). Delhi - A thousand years of Building. New Delhi: Roli Books Pvt Ltd. p. 63. ISBN81-7436-354-8. Consultado el 19 de mayo de 2009. «The Lal Gumbad itself is very similar to the tomb of Ghiyasuddin Tughlaq (died 1324), although it was built much later in the century for Shiekh Kabiruddin Auliya, a disciple of Chiragh Delhi».
Y.D.Sharma (2001). «Delhi and its Neighbourhood». Siri Fort & A- Siris (New Delhi: Archaeological Survey of India). pp. 25 & 73. Archivado desde el original el 31 de agosto de 2005. Consultado el 24 de abril de 2009.
