@article{03728940,
title = {A generalization of contraction principle.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {4},
year = {1981},
pages = {201-206},
doi = {10.1155/S0161171281000148},
zbl = {0465.47037},
language = {en},
url = {http://dml.mathdoc.fr/item/03728940}
}
Ghosh, K.M. A generalization of contraction principle.. International Journal of Mathematics and Mathematical Sciences, Tome 4 (1981) pp. 201-206. doi : 10.1155/S0161171281000148. http://gdmltest.u-ga.fr/item/03728940/