@article{ASNSP_1987_4_14_2_285_0,
     author = {Da Prato, G. and Sinestrari, E.},
     title = {Differential operators with non dense domain},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {285--344},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 14},
     number = {2},
     year = {1987},
     mrnumber = {939631},
     zbl = {0652.34069},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1987_4_14_2_285_0/}
}