Integral automorphisms of affine spaces over finite fields
  A permutation of the point set of the affine space $AG(n,q)$ is called an integral automorphism if it preserves the integral distance defined among the points. In this paper, we complete the classification of the integral automorphisms of $AG(n,q)$ for $n\ge 3$. 
Istv\'an Kov\'acs, Klavdija Kutnar, J\'anos Ruff, Tam\'as Sz\H{o}nyi
math.CO