"0"^^ . . . . . "RIV/61989592:15310/07:00005601!RIV09-MSM-15310___" . . . "Contributions to General Algebra" . . "1"^^ . . . "A characterization of horizontal sums of Boolean rings" . "0"^^ . "http://www.isvav.cz/h11/resultDetail.do?rowId=RIV%2F61989592%3A15310%2F07%3A00005601!RIV09-MSM-15310___"^^ . . "Q.vQJRsLxSW6GMMfxrMmi69s.q8=" . . "\u010Cl\u00E1nek ve sborn\u00EDku m\u00E1 uvedeno ISBN nebo ISSN, ale to nen\u00ED v datab\u00E1zi Conference Proceedings Citation Index spole\u010Dnosti Thomson Reuters." .