TY  - JOUR
AU  - A. A. Dezin
TI  - The simplest solvable extensions of ultrahyperbolic and pseudoparabolic operators
JO  - Doklady Akademii Nauk
PY  - 1963
SP  - 1013
EP  - 1016
VL  - 148
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1963_148_5_a4/
LA  - ru
ID  - DAN_1963_148_5_a4
ER  -