@article{10_4064_ap_54_1_21_28,
     author = {Marek Ptak},
     title = {Continuous isometric semigroups and reflexivity},
     journal = {Annales Polonici Mathematici},
     pages = {21--28},
     publisher = {mathdoc},
     volume = {54},
     number = {1},
     year = {1991},
     doi = {10.4064/ap-54-1-21-28},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-54-1-21-28/}
}