@article{10_21136_CMJ_2021_0046_20,
     author = {Mouton, Sonja},
     title = {Generalized spectral perturbation and the boundary spectrum},
     journal = {Czechoslovak Mathematical Journal},
     pages = {603--621},
     publisher = {mathdoc},
     volume = {71},
     number = {2},
     year = {2021},
     doi = {10.21136/CMJ.2021.0046-20},
     mrnumber = {4263189},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2021.0046-20/}
}