%0 Journal Article %A Götlind, Erik %T Some Sheffer functions in n-valued logic %J Portugaliae mathematica %D 1952 %P 141-149 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1952__11_3_114708/ %G en %F PORMA_1952__11_3_114708