@article{PORMA_1967__26_1_115003,
     author = {Medeiros, Luiz Adauto},
     title = {An application of semigroups of class $C_0$},
     journal = {Portugaliae mathematica},
     pages = {71--77},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1967},
     mrnumber = {0250127},
     zbl = {0169.43502},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_1_115003/}
}