1. Every metric compactification is a Wallman-type compactification;Aarts,1968
2. Normal bases and compactifications;Alo;Math. Ann.,1968
3. On Wallman's method of compactification;Banaschewski;Math. Nachr.,1963
4. Wallman-type compactifications;Biles,1970
5. Biles, C. M., Multiple points and Wallman-type compactifications (preprint).