@article{GDZPPN002394723,
title = {Perfect normality, local neighborhood extension spaces, and contractibility of absolute retracts.},
journal = {Mathematische Zeitschrift},
volume = {85},
year = {1964},
pages = {385-391},
zbl = {0126.18302},
url = {http://dml.mathdoc.fr/item/GDZPPN002394723}
}
McCandless, Byron H. Perfect normality, local neighborhood extension spaces, and contractibility of absolute retracts.. Mathematische Zeitschrift, Tome 85 (1964) pp. 385-391. http://gdmltest.u-ga.fr/item/GDZPPN002394723/