Institution: | 1. Fakult?t für Mathematik, Technische Universit?t Chemnitz, D-09107, Chemnitz, Germany 2. Marine Hydrophysical Institute, Hydroacoustic Department, Ukrainian Academy of Sciences, Preobrazhenskaya Street 3, 270 100, Odessa, Ukraine 3. Faculty of Mechanics and Mathematics, Rostov-on-Don State University, Bolshaya Sadovaya Street 105, 344 711, Rostov-on-Don, Russia
|