On the Supersymmetric Extension of Gauss-Bonnet like Gravity
  We explore the supersymmetry invariance of a supergravity theory in the presence of a non-trivial boundary. The explicit construction of a bulk Lagrangian based on an enlarged superalgebra, known as $AdS$-Lorentz, is presented. Using a geometric approach we show that the supersymmetric extension of a Gauss-Bonnet like gravity is required in order to restore the supersymmetry invariance of the theory. 
P.K. Concha, M.C. Ipinza, L. Ravera, E.K. Rodr\'iguez
hep-th