@article{1177698888, author = {Freedman, David A.}, title = {An Oscillating Semigroup}, journal = {Ann. Math. Statist.}, volume = {38}, number = {6}, year = {1967}, pages = { 924-926}, language = {en}, url = {http://dml.mathdoc.fr/item/1177698888} }
Freedman, David A. An Oscillating Semigroup. Ann. Math. Statist., Tome 38 (1967) no. 6, pp. 924-926. http://gdmltest.u-ga.fr/item/1177698888/