An example of two non-isomorphic finite subdirectly irreducible bands generating the same variety of bands. B.M. Schein — 1972 Semigroup forum
Book review of "Social semigroups: a unified theory of scaling and blockmodelling as applied to social networks". B.M. Schein — 1997 Semigroup forum
A remark concerning congruences on [0,-] bisimple inverse semigroups. B.M. Schein — 1971 Semigroup forum