@article{1093870521, author = {Manca, V. and Salibra, A.}, title = {First-order theories as many-sorted algebras.}, journal = {Notre Dame J. Formal Logic}, volume = {25}, number = {1}, year = {1984}, pages = { 86-94}, language = {en}, url = {http://dml.mathdoc.fr/item/1093870521} }
Manca, V.; Salibra, A. First-order theories as many-sorted algebras.. Notre Dame J. Formal Logic, Tome 25 (1984) no. 1, pp. 86-94. http://gdmltest.u-ga.fr/item/1093870521/