@article{AM2_1994__48_2-3_137605,
     author = {J. Jachymski},
     title = {An iff fixed point criterion for continuous self-mappings on a complete metric space.},
     journal = {Aequationes mathematicae},
     pages = {163--170},
     publisher = {mathdoc},
     volume = {48},
     number = {2-3},
     year = {1994},
     zbl = {0805.47051},
     url = {http://geodesic.mathdoc.fr/item/AM2_1994__48_2-3_137605/}
}