Ustyugov, G. V., and V. V. Ershov. “Eruptions of Mud Volcanoes in Azerbaijan and Their Correlation With Strong Earthquakes”. Proceedings of Voronezh State University. Series: Geology0, no. 4 (September 23, 2019): 6-13. Accessed December 15, 2025. https://journals.vsu.ru/geology/article/view/2690.