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Hogo, M., Šnorek, M.
HOGO, M. and M. ŠNOREK. Rough Sets Theory and Data Reduction in Information Systems and Data Mining. In: Tvorba softwaru 2002. Ostrava, 2002-05-29/2002-05-31. Ostrava: Tanger, 2002. p. 63-69. ISBN 80-85988-74-7.