@article{GT_2014_18_1_a2,
     author = {Martin, Alexandre},
     title = {Non-positively curved complexes of groups and boundaries},
     journal = {Geometry & topology},
     pages = {31--102},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {2014},
     doi = {10.2140/gt.2014.18.31},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/gt.2014.18.31/}
}