@article{ASNSP_1999_4_28_1_141_0,
     author = {Keller, Gerhard and Liverani, Carlangelo},
     title = {Stability of the spectrum for transfer operators},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {141--152},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 28},
     number = {1},
     year = {1999},
     mrnumber = {1679080},
     zbl = {0956.37003},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1999_4_28_1_141_0/}
}