The Cauchy extension of an ordered abelian group realized by r -valuations Angeliki Kontolatou (2002) Acta Mathematica et Informatica Universitatis Ostraviensis
The spectral theory of semitopological semilattices. Ershov, Yu. L. (2003) Sibirskij Matematicheskij Zhurnal
The structure semilattice of a compact U.D.C. semigroup. D.R. Brown, J.W. Stepp (1985) Semigroup forum
The universal semilattice compactification of a semigroup. Ebrahimi Vishki, H.R., Pourabdollah, M.A. (1999) International Journal of Mathematics and Mathematical Sciences
Topological semilattices with enough closed subsemilattices to separate points. W. Stepp (1980) Semigroup forum