@article{SF_1996__53_2_135484,
     author = {P.K. Lin},
     title = {Extremal properties of contraction semigroups on c0 .},
     journal = {Semigroup forum},
     pages = {208--211},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     zbl = {0858.47026},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135484/}
}