@article{10_4064_fm176_1_1,
     author = {Carlos Uzc\'ategui},
     title = {On the complexity of subspaces of $S_{\omega} $},
     journal = {Fundamenta Mathematicae},
     pages = {1--16},
     publisher = {mathdoc},
     volume = {176},
     number = {1},
     year = {2003},
     doi = {10.4064/fm176-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm176-1-1/}
}