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On semichained refinements of chains in equivalence lattice. (A note to a theorem of O. Borůvka.). (English) Zbl 0135.03102
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[1] O. Borůvka: Grundlagen der Gruppoid- und Gruppentheorie. Berlin 1960. · Zbl 0091.02001
[2] P. Dubreil: Algèbre. Paris 1954. · Zbl 0057.25001
[3] P. Dubreil M. L. Dubreil-Jacotin: Théorie algébrique des relations d’équivalence. Journal de math, pure et appl. 18 (1939), 63-95. · JFM 65.0080.01
[4] V. Kořínek: Der Schreiersche Satz und das Zassenhaussche Verfahren in Verbänden. Věstník Královské české společnosti nauk, třída matem.-přír. 1941, spis XIV, 1-29. · JFM 67.0086.01
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