@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/