1. Acocella, V. 2006. Caldera types: how end-members relate to evolutionary stages of collapse. Geophysical Research Letters, 33, paper number L18314.
2. Analogue models of collapse calderas and resurgent domes
3. How the development of magma chambers affects collapse calderas: insights from an overview
4. Aliyev, A. , Guliyev, I.S. & Belov, I.S. 2002. Catalogue of Recorded Eruptions of Mud Volcanoes of Azerbaijan (for Period of Years 1810 to 2001). Nafta Press, Baku (in Russian).