TY - JOUR AU - I. A. Finogenko TI - Reduction theorems for differential equations that arise in the dynamics of systems with friction JO - Differencialʹnye uravneniâ PY - 1998 SP - 1609 EP - 1615 VL - 34 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1998_34_12_a3/ LA - ru ID - DE_1998_34_12_a3 ER -