Andrzej Pietruszczak:
Cardinalities of Models and the Expressive Power of Monadic Predicate Logic (with Equality and Individual Constants).
49-64 Electronic Edition (link) BibTeX
Jerzy Hanusek:
Decidability of Classes of Finite Algebras with a Distinguished Subset Closed Under a Discriminator Clone.
65-82 Electronic Edition (link) BibTeX