@article{10_4064_fm180_2_3,
     author = {B. Cascales and I. Namioka},
     title = {The {Lindel\"of} property and $\sigma $-fragmentability},
     journal = {Fundamenta Mathematicae},
     pages = {161--183},
     publisher = {mathdoc},
     volume = {180},
     number = {2},
     year = {2003},
     doi = {10.4064/fm180-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm180-2-3/}
}