@article{GT_2007_11_4_a4,
     author = {Presas, Francisco},
     title = {A class of non-fillable contact structures},
     journal = {Geometry & topology},
     pages = {2203--2225},
     publisher = {mathdoc},
     volume = {11},
     number = {4},
     year = {2007},
     doi = {10.2140/gt.2007.11.2203},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2007.11.2203/}
}