%0 Journal Article %A S. V. Dvoryaninov %T On Parametric Resonance or Why a Swing Swings, or Why it is Useful to Solve Differential Equations %J Matematičeskoe obrazovanie %D 2008 %P 27-33 %V 47 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MO_2008_47_3_a1/ %G ru %F MO_2008_47_3_a1