@article{378790,
      author = {Ayres, Ian.},
      url = {http://library.usi.edu/record/378790},
      title = {Optional law the structure of legal entitlements /  [electronic resource] :},
      publisher = {University of Chicago Press,},
      recid = {378790},
      pages = {x, 284 p. ;},
      address = {Chicago :},
      year = {2005},
}