TY - JOUR AU - I. E. Sharkawi TI - The Formal Solution of Mikusinski Operational Differential Equations With Variable Coefficients JO - Publications de l'Institut Mathématique PY - 1989 SP - 113 VL - _N_S_46 IS - 60 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_1989_N_S_46_60_a16/ LA - en ID - PIM_1989_N_S_46_60_a16 ER -