%0 Journal Article %A Nelson, Evelyn %T Finiteness of Semigroups of Operators in Universal Algebra %J Canadian journal of mathematics %D 1967 %P 764-768 %V 19 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-070-8/ %R 10.4153/CJM-1967-070-8 %F 10_4153_CJM_1967_070_8