@article{MZ_1964__85_170313,
     author = {Byron H. McCandless},
     title = {Perfect normality, local neighborhood extension spaces, and contractibility of absolute retracts.},
     journal = {Mathematische Zeitschrift},
     pages = {385--391},
     publisher = {mathdoc},
     volume = {85},
     year = {1964},
     zbl = {0126.18302},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__85_170313/}
}