@article{PORMA_1967__26_3_115026,
     author = {Doyle, P.H.},
     title = {Neighborhood deformation retraction in manifolds},
     journal = {Portugaliae mathematica},
     pages = {273--274},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1967},
     mrnumber = {0257997},
     zbl = {0187.45301},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_3_115026/}
}