1. H. L.Bentley, Extensions of Maps on Nearness Spaces. (Submitted).
2. N.Bourbaki, Th�orie des ensembles, Ch. 4. Paris 1957.
3. H.Herrlich, A concept of Nearness. (Submitted.)
4. H.Herrlich, On the extendability of continuous functions. (Preprint.)
5. H.Herrlich, Topological Functors. To appear in General Topology and Appl.