@article{1102708715,
author = {Little, Robert D.},
title = {Projective space as a branched covering of the sphere with orientable branch set.},
journal = {Pacific J. Math.},
volume = {115},
number = {2},
year = {1984},
pages = { 391-398},
language = {en},
url = {http://dml.mathdoc.fr/item/1102708715}
}
Little, Robert D. Projective space as a branched covering of the sphere with orientable branch set.. Pacific J. Math., Tome 115 (1984) no. 2, pp. 391-398. http://gdmltest.u-ga.fr/item/1102708715/