TY  - JOUR
AU  - B. S. Mityagin
TI  - On second mixed derivative
JO  - Doklady Akademii Nauk
PY  - 1958
SP  - 606
EP  - 609
VL  - 123
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a6/
LA  - ru
ID  - DAN_1958_123_4_a6
ER  -