1. Capobianco HMP, Cister AM, Maceio BF (2002) Market efficiency in Brazilian stock market: a weak form evidence. In: Proceedings of the 3rd IEEE International Conference on Data Mining (ICDM-03), Melbourne, Florida, November 2003, pp 685–694
2. O’Neill M, Brabazon T, Ryan C, Collins JJ (2001) Developing a market timing system using grammatical evolution. In: Proceedings of the 10th International Conference on Genetic Algorithms (ICGA 2001), San Francisco, California, pp 1375–1381
3. Abutaleb AS, Papanioannou MG (2000) Maximum likelihood estimation of time-varying parameters: an application to the Athens Stock Exchange index. Appl Econ 32(10):1323–1328
4. Ratanapakorn O, Sharma SC (2002) Interrelationships among regional stock index. Rev Financ Econ 11(2):91–108
5. Xia J (2002) Grey system theory to hydrology. Huazhong University of Science and Technology Press, Wuhan, China