@article{EXMATH_1991_1991_1_a15,
     author = {Silvestru Dragomir, Sever},
     title = {Aproximaci\'on de funcionales lineales continuos.},
     journal = {Extracta mathematicae},
     pages = {50-51},
     year = {1991},
     volume = {6},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1991_1991_1_a15/}
}