@article{10_1017_S0017089500004134,
     author = {Fisher, Brian},
     title = {Results on common fixed points on complete metric spaces},
     journal = {Glasgow mathematical journal},
     pages = {165--167},
     year = {1980},
     volume = {21},
     number = {1},
     doi = {10.1017/S0017089500004134},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500004134/}
}