@article{10_21136_CPM_1987_118323,
     author = {Dont, Miroslav and Dontov\'a, Eva},
     title = {Invariance of the {Fredholm} radius of an operator in potential theory},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {269--283},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1987},
     doi = {10.21136/CPM.1987.118323},
     mrnumber = {905974},
     zbl = {0657.31004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1987.118323/}
}