@article{M2AN_1993__27_1_1_0,
     author = {Angermann, L.},
     title = {Addendum to the paper {{\textquotedblleft}Numerical} solution of second-order equations on plane domains{\textquotedblright}},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {1--7},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {27},
     number = {1},
     year = {1993},
     mrnumber = {1204625},
     zbl = {0769.65077},
     language = {en},
     url = {http://archive.numdam.org/item/M2AN_1993__27_1_1_0/}
}