%0 Journal Article %A Kim, Seungil %T Error analysis of PML-FEM approximations for the Helmholtz equation in waveguides %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2019 %P 1191-1222 %V 53 %N 4 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2019026/ %R 10.1051/m2an/2019026 %G en %F M2AN_2019__53_4_1191_0