This paper finishes the classification of the finite primitive affine distance-transitive graphs by dealing with the only case left open. namely where the generalized Fitting subgroup of the stabilizer of a vertex is modulo scalars a simple group of classical Lie type defined over the characteristic dividing the number of vertices of the graph. All graphs that are found to occur are known.
['John van Bon', 'Am Arjeh Cohen', 'Hans Cuypers']
Affine distance-transitive graphs and classical groups