TY - JOUR AU - V. S. Mokeichev AU - A. V. Mokeichev TI - A~new approach to the theory of linear problems for systems of partial differential equations.~III JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1999 SP - 50 EP - 59 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1999_11_a5/ LA - ru ID - IVM_1999_11_a5 ER -