@article{1256050743, author = {Connes, A.}, title = {On the hierarchy of W. Krieger}, journal = {Illinois J. Math.}, volume = {19}, number = {4}, year = {1975}, pages = { 428-432}, language = {en}, url = {http://dml.mathdoc.fr/item/1256050743} }
Connes, A. On the hierarchy of W. Krieger. Illinois J. Math., Tome 19 (1975) no. 4, pp. 428-432. http://gdmltest.u-ga.fr/item/1256050743/