참고문헌
- Mininmal flows and their extensions J. Auslander
- Proc. Amer. Math. Soc. v.11 On the roximal relation in topological dynamics J. Auslander
- Trans. Amer. Math. Soc. v.123 Regular minimal sets, I. J. Auslander
- Trans. Amer. Math. Soc. v.11 A semigruop associated with a transformation group R. Ellis
- Lectures on topological dynamics R. Ellis
- Trans. Amer. Math. Soc. v.313 Weakly almost periodic flowa R. Ellis;M. Nerukar
- J. RIBS. v.25 A characterization of the objects in the enveloping semigrioup of a flow and the relation among different objects H. S. Song