@article{1093635159, author = {Smith, Jan M.}, title = {Propositional functions and families of types.}, journal = {Notre Dame J. Formal Logic}, volume = {30}, number = {2}, year = {1989}, pages = { 442-458}, language = {en}, url = {http://dml.mathdoc.fr/item/1093635159} }
Smith, Jan M. Propositional functions and families of types.. Notre Dame J. Formal Logic, Tome 30 (1989) no. 2, pp. 442-458. http://gdmltest.u-ga.fr/item/1093635159/