TY - JOUR AU - S. Z. Levendorskiǐ TI - The asymptotics of the spectrum of operators that are elliptic in the sense of Douglis--Nirenberg JO - Trudy Moskovskogo matematičeskogo obŝestva PY - 1989 SP - 34 EP - 57 VL - 52 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MMO_1989_52_a1/ LA - ru ID - MMO_1989_52_a1 ER -