Some Estimates for Eigenfunction Expansions and Spectral Functions Corresponding to Elliptic Differential Operators.
Open Access
- 1 December 1961
- journal article
- Published by Det Kgl. Bibliotek/Royal Danish Library in MATHEMATICA SCANDINAVICA
- Vol. 9, 107-121
- https://doi.org/10.7146/math.scand.a-10629