@article{SF_1989__38_2_134951,
     author = {Ph. Cl\'ement and O. Diekmann and M. Gyllenberg and H.J.A.M. Heijmans and H.R. Thieme},
     title = {A {Hille-Yosida} theorem for a class of weakly * continuous semigroups.},
     journal = {Semigroup forum},
     pages = {157--178},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1989},
     zbl = {0727.47025},
     url = {http://geodesic.mathdoc.fr/item/SF_1989__38_2_134951/}
}