Ilya A. Shutkov, Yulia N. Okulova, Vladimir Yu. Tyurin, Elena V. Sokolova, Denis A. Babkov, Alexander A. Spasov, Yulia A. Gracheva, Claudia Schmidt, Kirill I. Kirsanov, Alexander A. Shtil, Olga M. Redkozubova, Elena F. Shevtsova, Elena R. Milaeva, Ingo Ott and Alexey A. Nazarov