A new geometrical look at Ostrogradsky procedure
  Making use of the modern techniques of non-holonomic geometry and constrained variational calculus, a revisitation of Ostrogradsky's Hamiltonian formulation of the evolution equations determined by a Lagrangian of order >= 2 in the derivatives of the configuration variables is presented. 
Enrico Massa, Stefano Vignolo, Roberto Cianci, Sante Carloni
math-ph gr-qc math.MP