Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_2005_35_2a_6, author = {V. Popa}, title = {A general fixed point theorem for two pairs of mappings on two metric spaces}, journal = {Novi Sad Journal of Mathematics}, pages = {79-83}, publisher = {mathdoc}, volume = {35}, number = {2}, year = {2005}, url = {http://geodesic.mathdoc.fr/item/NSJOM_2005_35_2a_6/} }
V. Popa. A general fixed point theorem for two pairs of mappings on two metric spaces. Novi Sad Journal of Mathematics, Tome 35 (2005) no. 2. http://geodesic.mathdoc.fr/item/NSJOM_2005_35_2a_6/