Absolutely independent axiomatizations for countable sets in classical logic. - Joanna Grygiel (Stud Logica, 1989)

Freely generated filters in free Boolean algebras. - Joanna Grygiel (Stud Logica, 1995)

The Uniqueness of the Decomposition of Distributive Lattices into Sums of Boolean Lattices. - Joanna Grygiel; Piotr Wojtylak (Reports Math. Log., 1997)

Boolean Constructions of Independent Sets of Generators for Filters. - Joanna Grygiel (Reports Math. Log., 2001)

Application of the Cantor-Bendixon Construction to the Problem of Freely Generated Filters. - Joanna Grygiel (Reports Math. Log., 2004)