@article{EXMATH_1998_1998_1_a23,
     author = {Houimdi, M. and Ouali, M.},
     title = {El espectro de un desplazamiento ponderado de operadores.},
     journal = {Extracta mathematicae},
     pages = {327-333},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1998},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1998_1998_1_a23/}
}