Rough sets: probabilistic versus deterministic approach
Zdzisław Pawlak, S. K. M. Wong, W. Ziaro · Our Digital Library (Warsaw University of Technology) · 1990
W: B. Gains and J. Boose, editors, Machine Learning and Uncertain Reasoning 3, pages 227-242. Academic Press, New York, NY, 1990. see also: International Journal of Man Machine Studies 29 (1988) 81-85