1. GZG
Abt. Kristallographie, Georg-August-Universität Göttingen, 37077 Göttingen, Germany
2. Department
of Applied Mathematics, Kazan (Volga Region) Federal University, 420008 Kazan, Russia
3. Key
Laboratory of Ocean Energy Utilization and Energy Conservation of
Ministry of Education, Dalian University of Technology, Dalian, China