@article{ASNSP_1983_4_10_2_197_0,
     author = {Costabel, Martin and Stephan, Ernst and Wendland, Wolfgang L.},
     title = {On boundary integral equations of the first kind for the bi-laplacian in a polygonal plane domain},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {197--241},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 10},
     number = {2},
     year = {1983},
     mrnumber = {728434},
     zbl = {0563.45007},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1983_4_10_2_197_0/}
}