@article{10_2140_agt_2014_14_1627,
     author = {Kim, Raeyong},
     title = {Algebraic ranks of {CAT(0)} groups},
     journal = {Algebraic and Geometric Topology},
     pages = {1627--1648},
     year = {2014},
     volume = {14},
     number = {3},
     doi = {10.2140/agt.2014.14.1627},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.1627/}
}