TY  - JOUR
AU  - R. P. Tarasov
TI  - A quadratic root of a selfadjoint operator, and the Cauchy problem for elliptic-type equations
JO  - Differencialʹnye uravneniâ
PY  - 1993
SP  - 662
EP  - 672
VL  - 29
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1993_29_4_a10/
LA  - ru
ID  - DE_1993_29_4_a10
ER  -