@article{GT_2006_10_4_a5,
     author = {Cooper, Daryl and Walsh, Genevieve S},
     title = {Virtually {Haken} fillings and semi-bundles},
     journal = {Geometry & topology},
     pages = {2237--2245},
     publisher = {mathdoc},
     volume = {10},
     number = {4},
     year = {2006},
     doi = {10.2140/gt.2006.10.2237},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2006.10.2237/}
}