%0 Journal Article
%T Undecidable Varieties of Semilattice—ordered Semigroups, of Boolean Algebras with Operators, and logics extending Lambek Calculus
%A KURUCZ,, Á.
%A NÉMETI,, I.
%A SAIN,, I.
%A SIMON,, A.
%J Logic Journal of the IGPL
%V 1
%N 1
%P 91-98
%@ 1367-0751
%D 1993-07-01
%I Oxford University Press
%~ DeepDyve