Continuity of spectrum and spectral radius in algebras of operators
Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 5, Tome 9 (1988) no. 1, pp. 5-54. 
@article{AFST_1988_5_9_1_5_0,
     author = {Burlando, Laura},
     title = {Continuity of spectrum and spectral radius in algebras of operators},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {5--54},
     publisher = {Universit\'e Paul Sabatier},
     address = {Toulouse},
     volume = {Ser. 5, 9},
     number = {1},
     year = {1988},
     mrnumber = {971812},
     zbl = {0618.47003},
     language = {en},
     url = {http://www.numdam.org/item/AFST_1988_5_9_1_5_0/}
}
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Burlando, Laura. Continuity of spectrum and spectral radius in algebras of operators. Annales de la Faculté des sciences de Toulouse : Mathématiques, Série 5, Tome 9 (1988) no. 1, pp. 5-54. http://www.numdam.org/item/AFST_1988_5_9_1_5_0/

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