@article{1255454997, author = {Luther, Indar S.}, title = {Uniqueness of the invariant mean on an abelian semigroup}, journal = {Illinois J. Math.}, volume = {3}, number = {1}, year = {1959}, pages = { 28-44}, language = {en}, url = {http://dml.mathdoc.fr/item/1255454997} }
Luther, Indar S. Uniqueness of the invariant mean on an abelian semigroup. Illinois J. Math., Tome 3 (1959) no. 1, pp. 28-44. http://gdmltest.u-ga.fr/item/1255454997/