@article{10_2140_agt_2009_9_1299,
     author = {Randell, Richard},
     title = {Homotopy groups and twisted homology of arrangements},
     journal = {Algebraic and Geometric Topology},
     pages = {1299--1308},
     year = {2009},
     volume = {9},
     number = {3},
     doi = {10.2140/agt.2009.9.1299},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2009.9.1299/}
}