%0 Journal Article %A Somora, Peter %T The lower bound of number of solutions for the second order nonlinear boundary value problem via the root functions method %J Mathematica slovaca %D 2007 %P [141] %V 57 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_2007__57_2_a4/ %G en %F MASLO_2007__57_2_a4