@article{10_4064_cm_49_1_49_52,
     author = {Roshdi Khalil},
     title = {Contractive operators of certain spaces},
     journal = {Colloquium Mathematicum},
     pages = {49--52},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {1984},
     doi = {10.4064/cm-49-1-49-52},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-49-1-49-52/}
}