@article{GDZPPN001177966,
title = {On the Condition Number of Boundary Integral Operators for the Exterior Dirichlet Problem for the Helmholtz Equation.},
journal = {Numerische Mathematik},
volume = {42},
year = {1983},
pages = {77-96},
zbl = {0534.35027},
url = {http://dml.mathdoc.fr/item/GDZPPN001177966}
}
Kreß, R.; Spassov, W.T. On the Condition Number of Boundary Integral Operators for the Exterior Dirichlet Problem for the Helmholtz Equation.. Numerische Mathematik, Tome 42 (1983) pp. 77-96. http://gdmltest.u-ga.fr/item/GDZPPN001177966/