@article{SF_1994__49_2_135355,
     author = {P.F. jr. Duvall and J.W. Emert and L.S. Husch},
     title = {Compactness conditions for semigroups of linear maps.},
     journal = {Semigroup forum},
     pages = {289--302},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1994},
     zbl = {0820.22002},
     url = {http://geodesic.mathdoc.fr/item/SF_1994__49_2_135355/}
}