Estimates of the Friedrichs-Lewy type for mixed problems in the theory of linear hyperbolic differential equations in two independent variables
- 1 December 1957
- journal article
- Published by Det Kgl. Bibliotek/Royal Danish Library in MATHEMATICA SCANDINAVICA
- Vol. 5, 93-113
- https://doi.org/10.7146/math.scand.a-10493