| Institution: | [1]Department of Mathematical Sciences, Norwegian University of Science and Technology, NO 7491 Trondheim, Norway; [2]Centre of Mathematics for Applications, University of Oslo, P.O. Box 1053, Blindern, N0-0316 Oslo, Norway [3]Centre of Mathematics for Applications, University of Oslo, P.O. Box 1053, Blindern, N-0316 Oslo, Norway [4]Faculty of Mathematics, University of Montenegro, 81000 Podgorica, Montenegro [5]Mathematical Analysis Department, Novgorod State University, ul. B. St. Peterburgskaya 41, 173003 Veliky Novgorod, Russia |
