@article{SF_1981__23_134530,
     author = {E.B. Davies and J. Goldstein},
     title = {One-Parameter {Semigroups,} {Acad.} {Press,} 1980.},
     journal = {Semigroup forum},
     pages = {375--378},
     publisher = {mathdoc},
     volume = {23},
     year = {1981},
     url = {http://geodesic.mathdoc.fr/item/SF_1981__23_134530/}
}