Author: Butler, Kim Ki-Hang

Butler, Kim Ki-Hang; Schwarz, Štefan: The semigroup of circulant Boolean matrices. (English). Czechoslovak Mathematical Journal, vol. 26 (1976), issue 4, pp. 632-635
Butler, Kim Ki-Hang; Krabill, James Richard: Circulant Boolean relation matrices. (English). Czechoslovak Mathematical Journal, vol. 24 (1974), issue 2, pp. 247-251

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