Author: Vserossiĭskai︠a︡ nauchno-metodicheskai︠a︡ konferent︠s︡ii︠a︡ "Problemy matematicheskogo obrazovanii︠a︡ v vuzakh i shkolakh Rossii v uslovii︠a︡kh ego modernizat︠s︡ii" (3rd 2011 Syktyvkar, Russia)