@article{2218, author = {G\"otlind, Erik}, title = {Some Sheffer functions in n-valued logic}, journal = {Portugaliae mathematica}, volume = {11}, year = {1952}, pages = {141-149}, zbl = {0047.01601}, mrnumber = {0053882}, language = {en}, url = {http://dml.mathdoc.fr/item/2218} }
Götlind, Erik. Some Sheffer functions in n-valued logic. Portugaliae mathematica, Tome 11 (1952) pp. 141-149. http://gdmltest.u-ga.fr/item/2218/