@article{EXMATH_1993_1993_1_a10,
     author = {Riahi, Hassan},
     title = {Grado topol\'ogico para las funciones convexas.},
     journal = {Extracta mathematicae},
     pages = {165-169},
     publisher = {mathdoc},
     volume = {8},
     number = {2-3},
     year = {1993},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1993_1993_1_a10/}
}