Haiko, Hennadii, and Volodymyr Biletsky. “The History of Industrial Oil Extraction in Azerbaijan (the 19th - Beginning of the 20th Centuries)”. Skhid, no. 4(162) (September 1, 2019): 35–40. Accessed April 25, 2024. https://skhid.kubg.edu.ua/article/view/176938.