@article{03671161,
title = {A pointwise contraction criteria for the existence of fixed points.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2},
year = {1979},
pages = {473-480},
doi = {10.1155/S0161171279000363},
zbl = {0431.47036},
language = {en},
url = {http://dml.mathdoc.fr/item/03671161}
}
Sehgal, V.M. A pointwise contraction criteria for the existence of fixed points.. International Journal of Mathematics and Mathematical Sciences, Tome 2 (1979) pp. 473-480. doi : 10.1155/S0161171279000363. http://gdmltest.u-ga.fr/item/03671161/