@article{1093891621, author = {Gogol, Daniel}, title = {Formulas with two generalized quantifiers.}, journal = {Notre Dame J. Formal Logic}, volume = {16}, number = {1}, year = {1975}, pages = { 133-136}, language = {en}, url = {http://dml.mathdoc.fr/item/1093891621} }
Gogol, Daniel. Formulas with two generalized quantifiers.. Notre Dame J. Formal Logic, Tome 16 (1975) no. 1, pp. 133-136. http://gdmltest.u-ga.fr/item/1093891621/