@article{10_2140_agt_2014_14_551,
     author = {Kent, Curtis},
     title = {Asymptotic cones of {HNN} extensions and amalgamated products},
     journal = {Algebraic and Geometric Topology},
     pages = {551--595},
     year = {2014},
     volume = {14},
     number = {1},
     doi = {10.2140/agt.2014.14.551},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.551/}
}