TY - JOUR AU - E. A. Chirkova TI - Investigation of a 3D system of differential equations with non-isolated JO - Čelâbinskij fiziko-matematičeskij žurnal PY - 2018 SP - 332 EP - 337 VL - 3 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CHFMJ_2018_3_3_a5/ LA - ru ID - CHFMJ_2018_3_3_a5 ER -