Geodesic
Graph reduction in the construction of minimal clique cover
Matematičeskie voprosy kriptografii, Tome 3 (2012) no. 3, pp. 105-128 Cet article a éte moissonné depuis la source Math-Net.Ru

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The problem of construction of a graph coverage with a minimum number of its complete subgraphs (cliques) is considered. We describe classes of subgraphs for which it is possible to reduce the graph coverage problem to the same problem for graphs of smaller orders. We show that these classes are wider than those known before. 
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P. V. Roldugin. Graph reduction in the construction of minimal clique cover. Matematičeskie voprosy kriptografii, Tome 3 (2012) no. 3, pp. 105-128. http://geodesic.mathdoc.fr/item/MVK_2012_3_3_a5/

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