N=4 Superconformal Mechanics and the Potential Structure of AdS Spaces
  The dynamics of an N=4 spinning particle in a curved background is described using the N=4 superfield formalism. The $SU(2)_{local}\times SU(2)_{global}$ N=4 superconformal symmetry of the particle action requires the background to be a real "K\"ahler-like" manifold whose metric is generated by a sigma-model superpotential. The anti-de-Sitter spaces are shown to belong to this class of manifolds. 
E.E. Donets, A. Pashnev, V.O. Rivelles, D.Sorokin and M. Tsulaia