Geodesic
Exceptional strongly regular graphs with eigenvalue~3
Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 19 (2013) no. 4, pp. 167-174

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A strongly regular graph $\Gamma$ with eigenvalue $m-1$ is called exceptional if it does not belong to the following list: (1) the union of isolated $m$-cliques, (2) a pseudogeometric graph for $pG_t(t+m-1,t)$, (3) the completion to a pseudogeometric graph for $pG_{m}(s,m-1)$, (4) a graph in the half case with parameters $(4\mu+1,2\mu,\mu-1,\mu)$, $\sqrt{4\mu+1}=m-1$. We find parameters of exceptional strongly regular graphs with nonleading eigenvalue 3.
Keywords: strongly regular graph, eigenvalue of a graph. 
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     title = {Exceptional strongly regular graphs with eigenvalue~3},
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A. A. Makhnev; D. V. Paduchikh. Exceptional strongly regular graphs with eigenvalue~3. Trudy Instituta matematiki i mehaniki, Trudy Instituta Matematiki i Mekhaniki UrO RAN, Tome 19 (2013) no. 4, pp. 167-174. http://geodesic.mathdoc.fr/item/TIMM_2013_19_4_a16/