@article{wilf:1992:rfc,
    author = {Wilf, Herbert S. and Zeilberger, Doron},
     title = {Rational function certification of multisum/integral/``{$q$}''
              identities},
   journal = {Bull. Amer. Math. Soc. (N.S.)},
  fjournal = {American Mathematical Society. Bulletin. New Series},
    volume = {27},
      year = {1992},
    number = {1},
     pages = {148–153},
      issn = {0273-0979},
     coden = {BAMOAD},
   mrclass = {11B65 (05A19 05A30 33D99)},
  mrnumber = {MR1145580 (93f:11017)},
mrreviewer = {Robert A. Gustafson},
     links = {\URL[Pdf]{http://www.ams.org/bull/pre-1996-data/199227-1/wilf.pdf}},
       doi = {10.1090/S0273-0979-1992-00297-5},
     zblno = {0759.05007}}