A counting theorem in the semigroup of circulant Boolean matrices
Štefan Schwarz (1977)
Czechoslovak Mathematical Journal
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Štefan Schwarz (1977)
Czechoslovak Mathematical Journal
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Kim Ki-Hang Butler, Štefan Schwarz (1976)
Czechoslovak Mathematical Journal
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Miroslav Fiedler, Vlastimil Pták (1967)
Czechoslovak Mathematical Journal
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