References
- N. Aoki, Topological Dynamics, Elsevier Sci. Pub., Tokyo, (1989).
- N. P. Bhatia and G. Szego, Dynamical Systems:Stability Theory and Applications, Springer-Verlag, Berlin, (1967).
- R. Knight, Unstable weak Attractor, Proc. Math. Soc. 86 (1982), 586-590. https://doi.org/10.1090/S0002-9939-1982-0674085-0
- K. Koo, On the ows near closed sets, Natural Science 23 (2012), 169-173.