@article{10_2140_agt_2006_6_1677,
     author = {Usher, Michael},
     title = {Vortices and a {TQFT} for {Lefschetz} fibrations on 4{\textendash}manifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {1677--1743},
     year = {2006},
     volume = {6},
     number = {4},
     doi = {10.2140/agt.2006.6.1677},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2006.6.1677/}
}