___

• [1] Pawlak, Z., Rough sets. International Journal of Computer and Information Sciences. 11 (1982), no.5, 341-356.
• [2] Molodtsov, D., Soft set theory-first results. Comput. Math. Appl. 37 (1999), 19-31.
• [3] Yüksel, ¸S., Güzel Ergül, Z. and Tozlu, N., Soft covering based rough sets and their application. The Scientific World Journal. (2014), Article ID 970893, 9 pages.
• [4] Zadeh, L. A., Fuzzy sets. Inform. Control. 8 (1965), 338-353.
• [5] Zhu, W. and Wang, F. Y., On three types of covering based rough sets. IEEE Transactions on Knowledge and Data Engineering. 19 (2007), no.8, 1131-1143.
• [6] Zhu, W., Topological approaches to covering rough sets. Information Science. 177 (2007), 1499-1508.
• [7] Maji, P. K., Biswas, R. and Roy, A. R., Soft set theory. Computers and Mathematics with Applications. 45 (2003), 555-562.
• [8] Ali, M. I., Feng, F., Liu, X., Min, W. K. and Shabir, M., On some new operations in soft set theory. Comput. Math. Appl. 57 (2009), 1547-1553.
• [9] Akta¸s, H. and Ça ˘gman, N., Soft sets and soft groups. Information Sciences. 177 (2007), 2726-2735.
• [10] Feng, F., Changxing, L., Davvaz, B. and Ali, M. I., Soft sets combined with fuzzy sets and rough sets: A tentative approach. Soft Comput. 14 (2010), 899-911.
• [11] Feng, F., Liu, X., Violeta, F. L. and Young, J. B., Soft sets and soft rough sets. Information Sciences. 181 (2011), 1125-1137.
• [12] Feng, F., Soft rough sets applied to multicriteria group decision making. Ann. Fuzzy Math. Inform. 2 (2011), no.1, 69-80.
• [13] Catolona, W. J., Partin, A. W., Slawin, K. M., Brawer, M. K., Flanigan, R. C. and Patel, A., Use of the percentage of free prostate-specific antigen to enhance differentiation of prostate cancer from benign prostatic disease: A prospective multicenter clinical trial. Journal of American Medical Association. 279 (1998), no.19, 1542-1547.
• [14] Egawa, S., Soh, S., Ohori, M., Uchida, T., Gohji, K., Fujii, A., Kuwao, S. and Koshiba, K., The ratio of free to total serum prostate specific antigen and its use in differential diagnosis of prostate carcinoma in Japan. Cancer. 79 (1997), 90-98.
• [15] Van Cangh, P. J., De Nayer, P., Sauvage, P., Tombal, B., Elsen, M., Lorge, F., Opsomer, R. and Wese, F. X., Free to total prostate-specific antiden (PSA) ratio is superior to total PSA in differentiating benign prostate hypertrophy from prostate cancer. The prostate. 29 (1996), 30-34.
• [16] Mettlin, C., Lee, F. and Drago, J., The American cancer society national prostate cancer detection, project: Findings on the detection of early prostate cancer in 2425 men. Cancer. 67 (1991), 2949-2958.
• [17] Nguyen, H. P. and Kreinovich, V., Fuzzy logic and its applications in medicine. International Journal of Medical Informatics. 62 (2001), 165-173.
• [18] Seker, H., Odetayo, M., Petrovic, D. and Naguib, R. N. G., A fuzzy logic based method for prognostic decision making in breast and prostate cancers. IEEE Transactions on Information Technology in Biomedicine. 7 (2003), 114-122.
• [19] ¸Simsekler, T. and Yüksel, ¸S., Fuzzy soft topological spaces. Ann. Fuzzy Math. Inform. 5 (2013), no.1, 87-96.
• [20] Chen, D., Tsang, E. C. C., Yeung, D. S. and Wang, X., The parametrization reduction of soft sets and its applications. Comput. Math. Appl. 49 (2005), 757-763.
• [21] Zou, Y. and Xiao, Z., Data analysis approaches of soft sets under incomplete information. Knowl. Based Syst. 21 (2008), 941-945.
• [22] Maji, P. K., Roy, A. R. and Biswas, R., Fuzzy soft sets. J. Fuzzy Math. 9 (2001), no.3, 589-602.
• [23] Lashin, E. F., Kozae, A. M., Abo Khadra, A. A. and Medhat, T., Rough set theory for topological spaces. International Journal of Approximate Reasoning. (2005), 35-43.
• [24] Kozae, A. M., Abo Khadra, A. A. and Medhat, T., Topological approach for approximation space (TAS). Proceeding of the 5th International Conference INFOS 2007 on Informatics and Systems. (2007), 289-302.
• [25] Allam, A. A., Bakeir, M. Y. and Abo Tabl, E. A., Some methods for generating topologies by relations. Bulletin of the Malaysian Mathematical Sciences Society. (2) 31 (2008), no.1, 35-45.
• [26] Wu, Q. E., Wang, T., Huang Y. X. and Li, J. S., Topology theory on rough sets. IEEE Transactions on Systems, Man, And Cybernetics-Part B:Cybernetics. 38 (2008), no.1, 68-77.
• [27] Wu, M., Wu, X., Shen, T. and Cao, C., A new type of covering approximation operators. 2009 International Conference on Electronic Computer Technology. (2009), 334-338.
• [28] Shabir, M. and Naz, M., On soft topological spaces. Computers and Mathematics with Applications. 61 (2011), no.7, 1786-1799.