@article{10_4064_fm_54_1_15_25,
     author = {P. Doyle and J. Hocking and R. Osborne},
     title = {Local invertibility},
     journal = {Fundamenta Mathematicae},
     pages = {15--25},
     year = {1964},
     volume = {54},
     number = {1},
     doi = {10.4064/fm-54-1-15-25},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-54-1-15-25/}
}