Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1998_28_1a_7, author = {O. Had\v{z}i\'c, T. \v{Z}iki\'c}, title = {On {Caristi{\textquoteright}s} fixed point theorem in {F-type} topological spaces}, journal = {Novi Sad Journal of Mathematics}, pages = {91-98}, publisher = {mathdoc}, volume = {28}, number = {1}, year = {1998}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1998_28_1a_7/} }
O. Hadžić, T. Žikić. On Caristi’s fixed point theorem in F-type topological spaces. Novi Sad Journal of Mathematics, Tome 28 (1998) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1998_28_1a_7/