@article{10_2140_agt_2010_10_2203,
     author = {Farber, Michael and Hanbury, Elizabeth},
     title = {Topology of configuration space of two particles on a graph, {II}},
     journal = {Algebraic and Geometric Topology},
     pages = {2203--2227},
     year = {2010},
     volume = {10},
     number = {4},
     doi = {10.2140/agt.2010.10.2203},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2010.10.2203/}
}