@article{10_4064_fm186_3_2,
     author = {David Asper\'o},
     title = {The nonexistence of robust codes for subsets of $\omega _1$},
     journal = {Fundamenta Mathematicae},
     pages = {215--231},
     publisher = {mathdoc},
     volume = {186},
     number = {3},
     year = {2005},
     doi = {10.4064/fm186-3-2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm186-3-2/}
}