@article{1093893651, author = {Purtill, Richard L.}, title = {Doing logic by computer.}, journal = {Notre Dame J. Formal Logic}, volume = {10}, number = {1}, year = {1969}, pages = { 150-162}, language = {en}, url = {http://dml.mathdoc.fr/item/1093893651} }
Purtill, Richard L. Doing logic by computer.. Notre Dame J. Formal Logic, Tome 10 (1969) no. 1, pp. 150-162. http://gdmltest.u-ga.fr/item/1093893651/