Maiden Tower (Baku) (English Wikipedia)

Baku's Maiden Tower Legendary Monument of Mystery, Azerbaijan International, Los Angeles Office Box 5217, Sherman Oaks, CA 91413, USA, http://www.azer.com/aiweb/categories/magazine/42_folder/42_articles/42_maidentower.html
Maiden Tower Secrets of the Maiden Tower: What They Reveal about Early Man's Beliefs, Azerbaijan International, Los Angeles Office Box 5217, Sherman Oaks, CA 91413, USA , http://www.azer.com/aiweb/categories/magazine/ai143_folder/143_articles/143_mt_secrets.html
Ronnie Gallagher and Betty Blair. "Secrets of the Maiden Tower:What They Reveal about Early Man's Beliefs". Azerbaijan International. Retrieved November 25, 2010.

azglobalcontext.org

Mahir Khalifa-zadeh and Leyla Khalifazadeh, The Legend of Baku Maiden Tower (Zoroastrian legends), http://www.azglobalcontext.org/2017/02/the-legend-of-baku-maiden-tower_17.html

Central Bank of Azerbaijan. National currency: 1, 5, 10, 50, 100 and 250 manat. – Retrieved on 25 February 2010.
Central Bank of Azerbaijan. National currency: 10 manat. – Retrieved on 25 February 2010.
Central Bank of Azerbaijan. National currency: New generation coins. – Retrieved on 25 February 2010.

Davud A.Akhundov, The Architecture of the Ancient and Early-Medieval Azerbaijan, In Russian, Baku, 1986,ISBN 5-94628-118-6, Azerneshr publishing house, pages-311, Ахундов Д. А. Архитектура древнего и раннесредневекового Азербайджана. Баку, Азернешр, 1986, ISBN 5-94628-118-6, стр-311 http://www.ebooks.az/book_0NetTl4d.html?lang=ru
Davud A.Akhundov, The Architecture of the Ancient and Early Medieval Azerbaijan, In Russian, Baku, 1986, ISBN 5-94628-118-6, Azerneshr publishing house, pp-311, Ахундов Д. А. Архитектура древнего и раннесредневекового Азербайджана. Баку, Азернешр, 1986, ISBN 5-94628-118-6, стр-311, http://www.ebooks.az/book_0NetTl4d.html?lang=ru

Azerbaijan. Pre-Islamic History, Encyclopedia Iranica, http://www.iranicaonline.org/articles/azerbaijan-iii

Mahir Khalifa-zadeh, On the Problem of Ancient Baku's Location, edited by Ziya Bunyatov, Newspaper Bakinsky Rabochiy, in Russian, Baku, Nov 24, 1988,https://ca.linkedin.com/in/prof-mahir-khalifa-zadeh-02a43844^{[permanent dead link]}

Mahir Khalifa-Zadeh and Leyla Khalifazadeh, Baku's Maiden Tower: Zoroastrian Legends & Architectural Mysteries, https://www.obscurehistories.com/post/baku-s-maiden-tower-zoroastrian-legends-architectural-mysteries

Jonathan M. Bloom and Sheila S. Blair, The Grove Encyclopedia of Islamic Art and Architecture, Oxford University Press, 2009, Vol N2. ISBN 9780195309911, page-239, http://www.oxfordreference.com/view/10.1093/acref/9780195309911.001.0001/acref-9780195309911

Ibrahimov, Dr. Kamil. "The Mystery of the Maiden Tower". Visions of Azerbaijan. pp. 22–26. Retrieved November 28, 2010.
Dr. Kamil Ibrahimov. "The Mystery of the Maiden Tower". Visions of Azerbaijan. Retrieved November 27, 2010.

"Walled City of Baku". World Heritage Site. Archived from the original on March 6, 2004. Retrieved November 27, 2010.