Author: Mezhdunarodnai︠a︡ nauchno-prakticheskai︠a︡ konferent︠s︡ii︠a︡ "Ėkologo-geograficheskie problemy prirodopolʹzovanii︠a︡ neftegazovykh regionov: teorii︠a︡, metody, praktika" (4th 2010 Nizhnevartovsk, Russia)