@article{MAN_1981__256_163518,
     author = {Zbigniew Slodkowski},
     title = {Analytic {Set-Valued} {Functions} and {Spectra.}},
     journal = {Mathematische Annalen},
     pages = {363--386},
     year = {1981},
     volume = {256},
     zbl = {0452.46028},
     url = {http://geodesic.mathdoc.fr/item/MAN_1981__256_163518/}
}