Author: Nauchno-prakticheskai︠a︡ konferent︠s︡ii︠a︡ "Obratnye zadachi i informat︠s︡ionnye tekhnologii rat︠s︡ionalʹnogo prirodopolʹzovanii︠a︡" (4th 2008 Khanty-Mansiĭsk, Russia)