TY  - JOUR
AU  - M. F. Atiyah
AU  - R. Bott
AU  - L. Gårding
TI  - Lacunas for hyperbolic differential operators with constant coefficients. I
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1971
VL  - 26
IS  - 2
UR  - http://geodesic.mathdoc.fr/item/RM_1971_26_2_a9/
LA  - ru
ID  - RM_1971_26_2_a9
ER  -