@article{1183739943, author = {Pincus, David and Solovay, Robert M.}, title = {Definability of Measures and Ultrafilters}, journal = {J. Symbolic Logic}, volume = {42}, number = {1}, year = {1977}, pages = { 179-190}, language = {en}, url = {http://dml.mathdoc.fr/item/1183739943} }
Pincus, David; Solovay, Robert M. Definability of Measures and Ultrafilters. J. Symbolic Logic, Tome 42 (1977) no. 1, pp. 179-190. http://gdmltest.u-ga.fr/item/1183739943/