@article{10_4153_CMB_1981_031_8,
     author = {Sato, Ryotaro},
     title = {An {Extrapolation} {Theorem} for {Contractions} with {Fixed} {Points}},
     journal = {Canadian mathematical bulletin},
     pages = {199--203},
     year = {1981},
     volume = {24},
     number = {2},
     doi = {10.4153/CMB-1981-031-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1981-031-8/}
}