@article{1255455733,
author = {Hermann, Robert},
title = {Obstruction theory for fibre spaces},
journal = {Illinois J. Math.},
volume = {4},
number = {1},
year = {1960},
pages = { 9-27},
language = {en},
url = {http://dml.mathdoc.fr/item/1255455733}
}
Hermann, Robert. Obstruction theory for fibre spaces. Illinois J. Math., Tome 4 (1960) no. 1, pp. 9-27. http://gdmltest.u-ga.fr/item/1255455733/