Geodesic
On distance-regular graphs with $\lambda=2$
Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 7 (2014) no. 2, pp. 204-210

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V. P. Burichenko and A. A. Makhnev have found intersection arrays of distance-regular graphs with $\lambda=2$, $\mu>1$, having at most 1000 vertices. Earlier, intersection arrays of antipodal distance-regular graphs of diameter 3 with $\lambda\leqslant2$ and $\mu=1$ were obtained by the second author. In this paper, the possible intersection arrays of distance-regular graphs with $\lambda=2$ and the number of vertices not greater than 4096 are obtained.
Keywords: distance-regular graph, nearly $n$-gon. 
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Alexander A. Makhnev; Marina S. Nirova. On distance-regular graphs with $\lambda=2$. Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika, Tome 7 (2014) no. 2, pp. 204-210. http://geodesic.mathdoc.fr/item/JSFU_2014_7_2_a6/