Zoltan Csajb ´ ok, & Tamas Mih ´ alyde ´ ak. (2012). Partial Approximative Set Theory: A Generalization of the Rough Set Theory. International Journal of Computer Information Systems and Industrial Management Applications, 4, 14. Retrieved from https://cspub-ijcisim.org/index.php/ijcisim/article/view/192