@article{GDZPPN002346192, title = {A Set Theory Based on a Certain 3-Valued Logic.}, journal = {Mathematica Scandinavica}, volume = {8}, year = {1960}, pages = {127-136}, zbl = {0096.24301}, url = {http://dml.mathdoc.fr/item/GDZPPN002346192} }
Skolem, Th. A Set Theory Based on a Certain 3-Valued Logic.. Mathematica Scandinavica, Tome 8 (1960) pp. 127-136. http://gdmltest.u-ga.fr/item/GDZPPN002346192/