@article{1256047474, author = {Heller, Alex}, title = {On the homotopy theory of topogenic groups and groupoids}, journal = {Illinois J. Math.}, volume = {24}, number = {4}, year = {1980}, pages = { 576-605}, language = {en}, url = {http://dml.mathdoc.fr/item/1256047474} }
Heller, Alex. On the homotopy theory of topogenic groups and groupoids. Illinois J. Math., Tome 24 (1980) no. 4, pp. 576-605. http://gdmltest.u-ga.fr/item/1256047474/