1. M. Ernè: Einführung in die Ordnungstheorie, (Bibliographisches Institut) Mannheim et al. 1982.
2. —: Lattice Representations for Categories of Closure Spaces, in: Categorical Topology (Proc. Conf. Toledo 1983), ed. by H. L. Bentley et al., (Heldermann) Berlin 1984, 197–222.
3. G. Gierz, K. H. Hofmann, K. Keimel, J. D. Lawson, M. Mislove and D. S. Scott: A Compendium of Continuous Lattices, (Springer) Berlin et al. 1980.
4. H. Herrlich: A Concept of Nearness, Gen. Top. Appl. 5 (1974), 191–212.
5. -Topological Structures, in: Topological Structures (Proc. J. de Groot, Amsterdam 1973), ed. by P. C. Baayen, Math. Centre Tracts 52 (1974), 59–122.