@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/