@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/