TY - JOUR AU - S. K. Ghosal AU - M. Chatterjee TI - On perturbation theory of a system of quasi-linear ordinary differential equations JO - Matematic̀Œki vesnik PY - 1974 SP - 185 VL - 26 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MV_1974_26_1_a25/ ID - MV_1974_26_1_a25 ER -