TY  - JOUR
AU  - A. G. Tumanyan
TI  - A priori estimates and Fredholm criteria for a class of regular hypoelliptic operators
JO  - Matematičeskie trudy
PY  - 2022
SP  - 220
EP  - 240
VL  - 25
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MT_2022_25_2_a9/
LA  - ru
ID  - MT_2022_25_2_a9
ER  -