@article{1093891712, author = {Englebretsen, George}, title = {Sommers' proof that something exists.}, journal = {Notre Dame J. Formal Logic}, volume = {16}, number = {1}, year = {1975}, pages = { 298-300}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891712} }
Englebretsen, George. Sommers' proof that something exists.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 298-300. http://gdmltest.u-ga.fr/item/1093891712/