Isometries, submetries and distance coordinates on Finsler manifolds
  This paper considers fundamental issues related to Finslerian isometries, submetries, distance and geodesics. It is shown that at each point of a Finsler manifold there is a distance coordinate system. Using distance coordinates, a simple proof is given for the Finslerian version of the Myers-Steenrod theorem and for the differentiability of Finslerian submetries. 
Bernadett Aradi and David Csaba Kertesz
math.DG