@article{EXMATH_2004_2004_1_a1,
     author = {Le\'on Saavedra, F.},
     title = {El teorema de superciclicidad positiva.},
     journal = {Extracta mathematicae},
     pages = {145-149},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2004_2004_1_a1/}
}