TY  - JOUR
AU  - Kleefeld, Andreas
TI  - The exterior problem for the Helmholtz equation with mixed boundary conditions in three dimensions
JO  - International journal of computer mathematics
VL  - 89
IS  - 17
SN  - 1029-0265
CY  - London [u.a.]
PB  - Taylor and Francis
M1  - FZJ-2017-01754
SP  - 2392 - 2409
PY  - 2012
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1080/00207160.2012.709932
UR  - https://juser.fz-juelich.de/record/827640
ER  -