TY  - JOUR
AU  - B. D. Annin
TI  - A certain property of a solution of the equation $u_{xx}u_{yy}-u_{xy}^2=1$
JO  - Doklady Akademii Nauk
PY  - 1966
SP  - 499
EP  - 501
VL  - 168
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1966_168_3_a1/
LA  - ru
ID  - DAN_1966_168_3_a1
ER  -