Bulletin of the Polish Academy of Sciences. Mathematics > 2003 > Vol. 51, no 1 > 59-67
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journal ISSN : | 0239-7269 |
journal e-ISSN : | 1732-8985 |
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Bibliography
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[1] R. Biswas, S. Nanda, Rough groups and rough subgroups, Bull. Pol. Ac. Math., 42 (1994) 251-254.
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[2] Z. Bonikowaski, Algebraic structures of rough sets, in: Rough sets, fuzzy sets and knowledge discovery, ed.: W. P. Ziarko, Springer-Verlag, Berlin (1995) 242-247.
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[3] J. M. Font, A. J. Rodrígez, A. Torrens, Wajsberg algebras, Stochastica, 8 (1984) 5-31.