1. Prime mappings, numbers of factors, and binary operations;van Douwen;Dissertations Math.,1981
2. Some properties of the Sorgenfrey line and related spaces;van Douwen;Pacific J. Math.,1979
3. Monotonically normal spaces;Heath;Trans. Amer. Math. Soc.,1973
4. On generalized ordered spaces;Lutzer;Dissertations Math.,1971
5. Another property of the Sorgenfrey line;Lutzer;Compositio Math.,1972