@article{1183525256,
author = {Hirsch, Morris W.},
title = {Obstruction theories for smoothing manifolds and maps},
journal = {Bull. Amer. Math. Soc.},
volume = {69},
number = {4},
year = {1963},
pages = { 352-356},
language = {en},
url = {http://dml.mathdoc.fr/item/1183525256}
}
Hirsch, Morris W. Obstruction theories for smoothing manifolds and maps. Bull. Amer. Math. Soc., Tome 69 (1963) no. 4, pp. 352-356. http://gdmltest.u-ga.fr/item/1183525256/