@article {MR3283835,
    AUTHOR = {Chen, Shaoshi and Chyzak, Fr\'{e}d\'{e}ric and Feng, Ruyong and Fu,
              Guofeng and Li, Ziming},
     TITLE = {On the existence of telescopers for mixed hypergeometric
              terms},
   JOURNAL = {J. Symbolic Comput.},
  FJOURNAL = {Journal of Symbolic Computation},
    VOLUME = {68},
      YEAR = {2015},
    NUMBER = {part 1},
     PAGES = {1--26},
      ISSN = {0747-7171},
   MRCLASS = {68W30 (33F10)},
  MRNUMBER = {3283835},
MRREVIEWER = {Marko Petkov\v{s}ek},
       DOI = {10.1016/j.jsc.2014.08.005},
       URL = {https://doi.org/10.1016/j.jsc.2014.08.005},
}