@article{ballentine:1998:mep,
     title = {Moment equations for probability distributions in classical and quantum mechanics},
    author = {Ballentine, L. E. and McRae, S. M.},
   journal = {Phys. Rev. A},
    volume = {58},
    number = {3},
     pages = {1799–1809},
      year = {1998},
       doi = {10.1103/PhysRevA.58.1799},
 publisher = {American Physical Society}}