TY - JOUR AU - P. A. Cojuhar' TI - On the finiteness of the discrete spectrum of some matrix pseudodifferential operators JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1989 SP - 42 EP - 50 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1989_1_a6/ LA - ru ID - IVM_1989_1_a6 ER -