@article{IM_1982__67_142916,
     author = {Mauricio Gutierrez},
     title = {Three {Conjectures} of {Combinatorial} {Topology.}},
     journal = {Inventiones mathematicae},
     pages = {357--362},
     publisher = {mathdoc},
     volume = {67},
     year = {1982},
     zbl = {0506.57002},
     url = {http://geodesic.mathdoc.fr/item/IM_1982__67_142916/}
}