Exact solution of the $p_x + ip_y$ pairing Hamiltonian by deforming the   pairing algebra
  The present paper makes a connection between collective bosonic states and the exact solutions of the $p_x + ip_y$ pairing Hamiltonian. This makes it possible to investigate the effects of the Pauli principle on the energy spectrum, by gradually reintroducing the Pauli principle. It also introduces an efficient and stable numerical method to probe all the eigenstates of this class of Hamiltonians. 
Mario Van Raemdonck, Stijn De Baerdemacker and Dimitri Van Neck
cond-mat.str-el