TY  - RPRT
TI  - Perfectly matched layers as nonlinear coordinate transforms: a generalized formalization.
AU  - Jean Paul Hugonin
AU  - Philippe Lalanne
PY  - 2005
DO  - 10.1364/josaa.22.001844
UR  - https://pubmed.ncbi.nlm.nih.gov/16211811/
ID  - 16211811
ER  -