@article{10_2140_agt_2006_6_171,
     author = {Bachman, David and Schleimer, Saul and Sedgwick, Eric},
     title = {Sweepouts of amalgamated 3{\textendash}manifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {171--194},
     year = {2006},
     volume = {6},
     number = {1},
     doi = {10.2140/agt.2006.6.171},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.171/}
}