Author: Mezhdunarodnai︠a︡ konferent︠s︡ii︠a︡ "Matematicheskoe modelirovanie fizicheskikh, ėkonomicheskikh, sot︠s︡ialʹnykh sistem i prot︠s︡essov" (3rd 2000 Ulʹi︠a︡novsk, Russia)