@article{1183736306, author = {Andrews, Peter}, title = {On Simplifying the Matrix of a WFF}, journal = {J. Symbolic Logic}, volume = {33}, number = {1}, year = {1968}, pages = { 180-192}, language = {en}, url = {http://dml.mathdoc.fr/item/1183736306} }
Andrews, Peter. On Simplifying the Matrix of a WFF. J. Symbolic Logic, Tome 33 (1968) no. 1, pp. 180-192. http://gdmltest.u-ga.fr/item/1183736306/