Generalized Caristi's fixed point theorems.
Latif, Abdul
Fixed Point Theory and Applications [electronic only], Tome 2009 (2009), / Harvested from The Electronic Library of Mathematics
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Publié le : 2009-01-01
DOI : https://doi.org/10.1155/2009/170140
EUDML-ID : urn:eudml:doc:55933 
@article{05574352,
     title = {Generalized Caristi's fixed point theorems.},
     journal = {Fixed Point Theory and Applications [electronic only]},
     volume = {2009},
     year = {2009},
     doi = {10.1155/2009/170140},
     zbl = {1171.54031},
     language = {en},
     url = {http://dml.mathdoc.fr/item/05574352}
}

Latif, Abdul. Generalized Caristi's fixed point theorems.. Fixed Point Theory and Applications [electronic only], Tome 2009 (2009) . doi : 10.1155/2009/170140. http://gdmltest.u-ga.fr/item/05574352/