TY - JOUR AU - V. V. Leonov TI - The problem of constructing a~fundamental solution of a~system of linear differential equations near an irregular singular point JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1958 SP - 123 EP - 141 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1958_3_a15/ LA - ru ID - IVM_1958_3_a15 ER -