Лексикографическое произведение графов (Russian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Лексикографическое произведение графов" in Russian language version.

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Geller D., Stahl S. The chromatic number and other functions of the lexicographic product // Journal of Combinatorial Theory. — 1975. — Т. 19. — С. 87–95. — doi:10.1016/0095-8956(75)90076-3.
Ravindra G., Parthasarathy K. R. Perfect product graphs // Discrete Mathematics. — 1977. — Т. 20, вып. 2. — С. 177–186. — doi:10.1016/0012-365X(77)90056-5.
Feigenbaum J., Schäffer A. A. Recognizing composite graphs is equivalent to testing graph isomorphism // SIAM Journal on Computing. — 1986. — Т. 15, вып. 2. — С. 619–627. — doi:10.1137/0215045.