TY - JOUR AU - A. T. Sazonova TI - On the solutions of the simplified system of nonlinear differential equations in the motion of four particles in a plane JO - Problemy fiziki, matematiki i tehniki PY - 2014 SP - 80 EP - 84 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PFMT_2014_3_a14/ LA - ru ID - PFMT_2014_3_a14 ER -