@article{1077312390,
author = {Brumfiel, G. W. and Milgram, R. J.},
title = {Normal maps, covering spaces, and quadratic functions},
journal = {Duke Math. J.},
volume = {44},
number = {1},
year = {1977},
pages = { 663-694},
language = {en},
url = {http://dml.mathdoc.fr/item/1077312390}
}
Brumfiel, G. W.; Milgram, R. J. Normal maps, covering spaces, and quadratic functions. Duke Math. J., Tome 44 (1977) no. 1, pp. 663-694. http://gdmltest.u-ga.fr/item/1077312390/