@article{1093638017, author = {Dzierzgowski, Daniel}, title = {Many-sorted elementary equivalence.}, journal = {Notre Dame J. Formal Logic}, volume = {29}, number = {2}, year = {1988}, pages = { 530-542}, language = {en}, url = {http://dml.mathdoc.fr/item/1093638017} }
Dzierzgowski, Daniel. Many-sorted elementary equivalence.. Notre Dame J. Formal Logic, Tome 29 (1988) no. 2, pp. 530-542. http://gdmltest.u-ga.fr/item/1093638017/