@article{10_4064_fm_60_2_149_155,
     author = {Richard Duke},
     title = {Open mappings of graphs and manifolds},
     journal = {Fundamenta Mathematicae},
     pages = {149--155},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {1967},
     doi = {10.4064/fm-60-2-149-155},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-60-2-149-155/}
}