TY  - JOUR
AU  - K. B. Sabitov
TI  - On the theory of the Frankl problem for equations of mixed type
JO  - Izvestiya. Mathematics 
PY  - 2017
SP  - 99
EP  - 136
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_2017_81_1_a3/
LA  - en
ID  - IM2_2017_81_1_a3
ER  -