@article{1183739040, author = {Richardson, Daniel}, title = {Sets of Theorems with Short Proofs}, journal = {J. Symbolic Logic}, volume = {39}, number = {1}, year = {1974}, pages = { 235-242}, language = {en}, url = {http://dml.mathdoc.fr/item/1183739040} }
Richardson, Daniel. Sets of Theorems with Short Proofs. J. Symbolic Logic, Tome 39 (1974) no. 1, pp. 235-242. http://gdmltest.u-ga.fr/item/1183739040/