@article{1256049652, author = {Grossman, Jerrold W.}, title = {Homotopy groups of pro-spaces}, journal = {Illinois J. Math.}, volume = {20}, number = {4}, year = {1976}, pages = { 622-625}, language = {en}, url = {http://dml.mathdoc.fr/item/1256049652} }
Grossman, Jerrold W. Homotopy groups of pro-spaces. Illinois J. Math., Tome 20 (1976) no. 4, pp. 622-625. http://gdmltest.u-ga.fr/item/1256049652/