@article{SF_1995__50_3_135389,
     author = {M. Ishikawa},
     title = {Analyticity of absorption semigroups.},
     journal = {Semigroup forum},
     pages = {307--316},
     publisher = {mathdoc},
     volume = {50},
     number = {3},
     year = {1995},
     zbl = {0835.47027},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__50_3_135389/}
}