1. Irkutsk State University; Al-Furat University
2. Irkutsk State University; Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Science
3. Voronezh State University
4. Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Science
5. Geological Institute, Siberian Branch of the Russian Academy of Science; Banzarov Buryat State University
6. Geological Institute, Siberian Branch of the Russian Academy of Science
7. Institute of the Earth’s Crust, Siberian Branch of the Russian Academy of Science; Al-Baath University