Closed JSC "Swets Information Services" Moscow, Russia

"Scweitzer Sortiment oHG" Fachbuchhandlung, Munchen, Germany

Closed JSC "Kristall" , Korolyov, Russia

ABE Marketing, Warsaw, Poland

Prof. Kajikawa, Shonan Institute of Technology, Fujisawa, Japan

Hong-chao Wang, School of Physics, Shandong University, P.R. China

Herzen Russian State Pedagogical University, Saint-Petersburg, Russia