R. S. Minasyan and S. Rammah, “NATURE OF CARBONATE KARST ACTIVATION AND ITS ECOLOGICAL CONSEQUENCES: (on example of the complex investigations in the territory of Ras Al Ayn City, SAR)”, Proc. YSU C: Geol. Geogr. Sci., vol. 44, no. 3 (223), pp. 30–33, Nov. 2010.