Geodesic
Automorphism groups of invariant lattices in the Steinberg module of groups of Lie type of odd characteristic
Sbornik. Mathematics, Tome 189 (1998) no. 9, pp. 1273-1294
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The purpose of this article is to compute the automorphism groups of $G$-invariant lattices in the Steinberg module $V$, where $G$ is a finite simple group of Lie type over a field of characteristic $p>2$. 
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     title = {Automorphism groups of invariant lattices in {the~Steinberg} module of groups of {Lie} type of odd characteristic},
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     url = {http://geodesic.mathdoc.fr/item/SM_1998_189_9_a0/}
}
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K. S. Abdukhalikov. Automorphism groups of invariant lattices in the Steinberg module of groups of Lie type of odd characteristic. Sbornik. Mathematics, Tome 189 (1998) no. 9, pp. 1273-1294. http://geodesic.mathdoc.fr/item/SM_1998_189_9_a0/

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