@article{EXMATH_1992_1992_1_a32,
     author = {Riahi, Hassan},
     title = {Aplicaci\'on del principio variacional de {Ekeland} a la existencia de soluciones {Pareto-\'optimas.}},
     journal = {Extracta mathematicae},
     pages = {42-45},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1992},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1992_1992_1_a32/}
}