@article{SF_1994__49_2_135359,
     author = {S. Cerrai},
     title = {A {Hille-Yosida} theorem for weakly continuous semigroups.},
     journal = {Semigroup forum},
     pages = {349--368},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1994},
     zbl = {0817.47048},
     url = {http://geodesic.mathdoc.fr/item/SF_1994__49_2_135359/}
}