Geodesic
On completely regular graphs with $k=11, $ $\lambda=4$
Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 154 (2012) no. 2, pp. 83-92 Cet article a éte moissonné depuis la source Math-Net.Ru

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It is well known that if $\Gamma$ is a connected edge-regular graph with $b_1=1$, then $\Gamma$ is a polygon or a complete multipartite graph $K_{n\times2}$. A. A. Makhnev and his students have studied completely regular graphs with $2\le b_1\le5$. In our earlier article, the study of completely regular graphs with $b_1=6$ was reduced to the investigation of graphs with $k\in\{10,11,12\}$. Together with M. S. Nirova, we considered the case $b_1=6$, $k=10$. This paper deals with completely regular graphs with $b_1=6$ and $k=11$.
Keywords: graph, completely regular graph. 
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K. S. Efimov; A. A. Makhnev. On completely regular graphs with $k=11, $ $\lambda=4$. Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, Tome 154 (2012) no. 2, pp. 83-92. http://geodesic.mathdoc.fr/item/UZKU_2012_154_2_a7/

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