Geodesic
Automorphisms of Chevalley groups of types $B_2$ and $G_2$ over local rings
Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 4, pp. 3-29.

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In the paper, we prove that every automorphism of any adjoint Chevalley group of type $B_2$ or $G_2$ is standard, i.e., it is a composition of an “inner” automorphism, a ring automorphism, and a central automorphism. 
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E. I. Bunina. Automorphisms of Chevalley groups of types $B_2$ and $G_2$ over local rings. Fundamentalʹnaâ i prikladnaâ matematika, Tome 13 (2007) no. 4, pp. 3-29. http://geodesic.mathdoc.fr/item/FPM_2007_13_4_a0/

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