TY  - JOUR
AU  - VIDAR THOMÉE
TI  - Estimates of the Friedrichs-Lewy type for mixed problems in the theory of linear hyperbolic differential equations in two independent variables
JO  - Mathematica Scandinavica
PY  - 1957
SP  - 93
EP  - 114
VL  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1957__5_165654/
ID  - MS2_1957__5_165654
ER  -