@article{ASNSP_2007_5_6_1_53_0,
     author = {Koz{\l}, Wojciech},
     title = {Laplace type operators: {Dirichlet} problem},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {53--80},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 6},
     number = {1},
     year = {2007},
     mrnumber = {2341515},
     zbl = {1185.35039},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_2007_5_6_1_53_0/}
}