TY - JOUR AU - S. P. Chulkov TI - On the Convergence of Formal Solutions of a System of Partial Differential Equations JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 2005 SP - 64 EP - 75 VL - 39 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_2005_39_3_a5/ LA - ru ID - FAA_2005_39_3_a5 ER -