@article{03834904, title = {Generalized contraction principle.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {6}, year = {1983}, pages = {89-94}, doi = {10.1155/S016117128300006X}, zbl = {0526.54030}, language = {en}, url = {http://dml.mathdoc.fr/item/03834904} }
Chatterjee, Dipak. Generalized contraction principle.. International Journal of Mathematics and Mathematical Sciences, Tome 6 (1983) pp. 89-94. doi : 10.1155/S016117128300006X. http://gdmltest.u-ga.fr/item/03834904/