• Behnia, M.R. (2001). Birjand the jewel of the dosert. Tehran:
University of Tehran.
• Encyclopaedia of the World of Islam. (1996). Under supervision of Seyyed Mostafa Mir Salim, the letter "b", Vol. 1, Tehran: Encyclopaedia of the World of Islam, explanation of the word garden, 570-604.
• Mansouri, S. (2005). An Introduction to the Aesthetics of Iranian Garden. Bagh-e Nazar, 2 (3): 58-63.
• Pirnia, M.K. (1994). Bagh-ha-ye Irani [Persian Gardens]. Abadi, 4 (15): 4.
• Ranjbar, E., Mehrabani Golzar, M. & Fatemi, M. (2006). An
Introduction to Recognize Birjand’s Historical Gardens. Bagh-e Nazar, 2 (4): 50-71.
• Shahcheraghi, A. (2010). Paradigms of paradise: An introduction to the recognition and reclamation of Persian Garden. Tehran: Jahad daneshgahi Tehran.
• Soltanzadeh, H. (1999). Design continuity of the persian Garden in Taj Mahal Mausoleum of an Iranian origin lady. Tehran: Daftar-e Pajihesh-ha-ye Farhangi.
• South Khorasan cultural heritage and tourism organization,
Archives of historical records and documents.
• Tasnim News Agency. (2016). Ghanat-e Bagh va Emarat-e Tarikhi-ye Bahlgerd Maremat Shod [The Qanat and mansion of Bahlgerd Garden was renovated]. Available from: https://www.tasnimnews.com/fa/news/1395/09/03/1248061 (Accssed 7 June 2019).
• Wilber, D.N. (1969). Persian gardens and garden pavilions. Translated by M. Saba, Tehran: Bongah-e Tarjome va Nashr-e Ketab.