@article{1093894222, author = {Fitting, Melvin}, title = {A tableau proof method admitting the empty domain.}, journal = {Notre Dame J. Formal Logic}, volume = {12}, number = {1}, year = {1971}, pages = { 219-224}, language = {en}, url = {http://dml.mathdoc.fr/item/1093894222} }
Fitting, Melvin. A tableau proof method admitting the empty domain.. Notre Dame J. Formal Logic, Tome 12 (1971) no. 1, pp. 219-224. http://gdmltest.u-ga.fr/item/1093894222/