TY - JOUR AU - S. V. Dvoryaninov TI - On Parametric Resonance or Why a Swing Swings, or Why it is Useful to Solve Differential Equations JO - Matematičeskoe obrazovanie PY - 2008 SP - 27 EP - 33 IS - 3 UR - http://geodesic.mathdoc.fr/item/MO_2008_3_a1/ LA - ru ID - MO_2008_3_a1 ER -