@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/