A categorical generalization of a theorem of G. Birkhoff on primitive classes of universal algebras
Karel Drbohlav (1965)
Commentationes Mathematicae Universitatis Carolinae
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Karel Drbohlav (1965)
Commentationes Mathematicae Universitatis Carolinae
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Miroslav Hušek (1967)
Commentationes Mathematicae Universitatis Carolinae
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Aleš Pultr (1968)
Commentationes Mathematicae Universitatis Carolinae
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