@article{10_4064_cm_38_2_229_230,
     author = {B. Fisher},
     title = {On contraction mappings},
     journal = {Colloquium Mathematicum},
     pages = {229--230},
     publisher = {mathdoc},
     volume = {38},
     number = {2},
     year = {1977},
     doi = {10.4064/cm-38-2-229-230},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-38-2-229-230/}
}