Instantons, Euclidean supersymmetry and Wick rotations
  We discuss the reality properties of the fermionic collective coordinates in Euclidean space in an instanton background and construct hermitean actions for N = 4 and N = 2 supersymmetric Euclidean Yang-Mills theories. 
A.V. Belitsky, S. Vandoren, P. van Nieuwenhuizen