Fractional powers of non-densely defined operators
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 18 (1991) no. 3, p. 443-454
@article{ASNSP_1991_4_18_3_443_0,
     author = {Mart\'\i nez, Celso and Sanz, Miguel},
     title = {Fractional powers of non-densely defined operators},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 18},
     number = {3},
     year = {1991},
     pages = {443-454},
     zbl = {0811.47013},
     mrnumber = {1145317},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1991_4_18_3_443_0}
}
Martinez, Celso; Sanz, Miguel. Fractional powers of non-densely defined operators. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 18 (1991) no. 3, pp. 443-454. http://www.numdam.org/item/ASNSP_1991_4_18_3_443_0/

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