We define elementary automorphisms of the $n$-dimentional vector group over an algebraically closed field of positive characteristic and show that they generate the automorphism group of the vector group. We also give a necessary and sufficient computational condition for a $d$-tuple of $p$-polynomials to be a component of an $n$-tuple of $p$-polynomials defining an automorphism of the vector group.
"Automorphism groups of vector groups over a field of positive characteristic." Hiroshima Math. J. 38 (3) 437 - 446, November 2008. https://doi.org/10.32917/hmj/1233152780