Physical Wigner functions
  In spite of their potential usefulness, the characterizations of Wigner functions for Bose and Fermi statistics given by O'Connell and Wigner himself almost thirty years ago has drawn little attention. With an eye towards applications in quantum chemistry, we revisit and reformulate them in a more convenient way. 
Carlos L. Benavides-Riveros, Jos\'e M. Gracia-Bond\'ia
quant-ph physics.chem-ph