TY - JOUR AU - A. T. Sazonova TI - On solutions of simplified systems of nonlinear differential equations related to the problem of four bodies JO - Problemy fiziki, matematiki i tehniki PY - 2014 SP - 69 EP - 73 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PFMT_2014_1_a11/ LA - ru ID - PFMT_2014_1_a11 ER -