@article{1256054563,
author = {Ganea, T.},
title = {Lusternik-Schnirelmann category and strong category},
journal = {Illinois J. Math.},
volume = {11},
number = {4},
year = {1967},
pages = { 417-427},
language = {en},
url = {http://dml.mathdoc.fr/item/1256054563}
}
Ganea, T. Lusternik-Schnirelmann category and strong category. Illinois J. Math., Tome 11 (1967) no. 4, pp. 417-427. http://gdmltest.u-ga.fr/item/1256054563/