1. Distributive Lattices;Balbes,1974
2. Normal systems of sets;Banaschewski;Math. Nachr.,1962
3. Extensions of topological spaces;Banaschewski;Canad. Math. Bull.,1964
4. Embeddings of bornological universes;Beer;Set-Valued Anal.,2008
5. Total boundedness in metrizable spaces;Beer;Houston J. Math.,2011