@article{MZ_1981__177_173073,
     author = {G\"unther Greiner},
     title = {Zur {Perron-Frobenius-Theorie} stark stetiger {Halbgruppen.}},
     journal = {Mathematische Zeitschrift},
     pages = {401--424},
     year = {1981},
     volume = {177},
     zbl = {0461.47016},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__177_173073/}
}