1. Abd El-Monsef MM, Seddeek MK, Medhat T, Kozae AM, Sharshar T, Badran HM. Classification of Sand Samples According to Radioactivity Content by the Use of Euclidean and Rough Sets Techniques, Fourth Conf. Nucl. Particle Phys., Fayom-Egypt, October 11–15, 2003
2. Aisling Mc, Brain Mc. Topology Course Lecture Notes. Topology atlas home page, 1997 available from:
3. Aleksander Ohrn. Discernability and Rough Sets in Medicine Tools and applications, Ph.D. Thesis, Torndheim, Norway, 1999
4. Anders Torvill. Time Series and Rough Sets, Master’s Thesis, Norwegian, Torndheim, Norway, 1996
5. Information: the New Language of Science;Christian,2003