@article{LJM_2006_21_a1,
     author = {A. Benbrik and A. Mbarki and S. Lahrech and A. Ouahab},
     title = {Ekeland's principle for vector-valued maps based on the characterization of uniform spaces via families of generalized quasi-metrics},
     journal = {Lobachevskii journal of mathematics},
     pages = {33--44},
     publisher = {mathdoc},
     volume = {21},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2006_21_a1/}
}