@article{10_2140_agt_2012_12_435,
     author = {Scoville, Nicholas~A},
     title = {Lusternik{\textendash}Schnirelmann category and the connectivity of {X}},
     journal = {Algebraic and Geometric Topology},
     pages = {435--448},
     year = {2012},
     volume = {12},
     number = {1},
     doi = {10.2140/agt.2012.12.435},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2012.12.435/}
}