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- [1] PRIMITIVE SYSTEMS OF SUBSETS OF A FINITE-SET PUBLICATIONES MATHEMATICAE-DEBRECEN, 1988, 35 (3-4): : 321 - 324
- [5] REGULARITY OF MEAN-VALUES JOURNAL OF THE AUSTRALIAN MATHEMATICAL SOCIETY SERIES A-PURE MATHEMATICS AND STATISTICS, 1988, 45 : 117 - 126
- [8] ON THE POWER AND STRUCTURE OF SOME POST CLOSED CLASSES (OF THE FAMILIES OF FINITE-SET SUBSETS) DOKLADY AKADEMII NAUK SSSR, 1987, 295 (03): : 533 - 537