@article{10_2140_agt_2010_10_1285,
     author = {Eliyahu, Meital and Liberman, Eran and Schaps, Malka and Teicher, Mina},
     title = {The characterization of a line arrangement whose fundamental group of the complement is a direct sum of free groups},
     journal = {Algebraic and Geometric Topology},
     pages = {1285--1304},
     year = {2010},
     volume = {10},
     number = {3},
     doi = {10.2140/agt.2010.10.1285},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2010.10.1285/}
}