Geodesic
On pseudogeometrical graphs for some partial geometries
Fundamentalʹnaâ i prikladnaâ matematika, Tome 8 (2002) no. 1, pp. 117-127.

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It is shown that a pseudogeometrical graph $\Gamma$ for $\mathrm{GQ}(4,12)$, containing a $49$-coclique $\mathcal O$, is a point graph of generalized quadrangle. Furthermore, the subgraph $\Gamma-\mathcal O$ is strongly regular with parameters $(196,39,2,9)$. It is proved that a pseudogeometrical graph for partial geometry $\mathrm{pG}_2(5,32)$ is locally a $\mathrm{GQ}(4,8)$-graph. 
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A. A. Makhnev. On pseudogeometrical graphs for some partial geometries. Fundamentalʹnaâ i prikladnaâ matematika, Tome 8 (2002) no. 1, pp. 117-127. http://geodesic.mathdoc.fr/item/FPM_2002_8_1_a9/

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