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المؤلفون: Boštjan Brešar, Douglas F. Rall, Kirsti Kuenzel
المصدر: Journal of Graph Theory. 99:359-377
مصطلحات موضوعية: Combinatorics, symbols.namesake, symbols, Discrete Mathematics and Combinatorics, Digraph, Geometry and Topology, Cartesian product, Direct product, Mathematics