@article{GT_2013_17_1_a3,
     author = {Blair, Ryan and Tomova, Maggy},
     title = {Width is not additive},
     journal = {Geometry & topology},
     pages = {93--156},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2013},
     doi = {10.2140/gt.2013.17.93},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2013.17.93/}
}