@article{AGMS_2016_4_1_a13,
     author = {Descombes, Dominic and Lang, Urs},
     title = {Flats in {Spaces} with {Convex} {Geodesic} {Bicombings}},
     journal = {Analysis and Geometry in Metric Spaces},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {2016},
     zbl = {1341.53070},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AGMS_2016_4_1_a13/}
}