1. Institute for Geothermal Researches and Renewable Energy - A Branch of the Joint Institute for High Temperatures of Russian Academy of Sciences, Makhachkala, Russia
2. Institute for Geothermal Researches and Renewable Energy - A Branch of the Joint Institute for High Temperatures of Russian Academy of Sciences, Makhachkala, Russia + Dagestan State University, Makhachkala, Russia
3. Institute for Geothermal Researches and Renewable Energy - A Branch of the Joint Institute for High Temperatures of Russian Academy of Sciences, Makhachkala, Russia + Dagestan State Technical University, Makhachkala, Russia