A remark on isotopies of digraphs and permutation matrices
Časopis pro pěstování matematiky, Tome 102 (1977) no. 3, pp. 230-233.

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DOI : 10.21136/CPM.1977.108463
Classification : 05C20
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     title = {A remark on isotopies of digraphs and permutation matrices},
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Zelinka, Bohdan. A remark on isotopies of digraphs and permutation matrices. Časopis pro pěstování matematiky, Tome 102 (1977) no. 3, pp. 230-233. doi : 10.21136/CPM.1977.108463. http://geodesic.mathdoc.fr/articles/10.21136/CPM.1977.108463/

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