@article{10_2140_agt_2007_7_1805,
     author = {Strom, Jeffrey},
     title = {Lusternik{\textendash}Schnirelmann category of spaces with free fundamental group},
     journal = {Algebraic and Geometric Topology},
     pages = {1805--1808},
     year = {2007},
     volume = {7},
     number = {4},
     doi = {10.2140/agt.2007.7.1805},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2007.7.1805/}
}