@article {MR2578341,
    AUTHOR = {Feng, Ruyong and Singer, Michael F. and Wu, Min},
     TITLE = {An algorithm to compute {L}iouvillian solutions of prime order
              linear difference-differential equations},
   JOURNAL = {J. Symbolic Comput.},
  FJOURNAL = {Journal of Symbolic Computation},
    VOLUME = {45},
      YEAR = {2010},
    NUMBER = {3},
     PAGES = {306--323},
      ISSN = {0747-7171},
   MRCLASS = {34C20 (12H10 39B42)},
  MRNUMBER = {2578341 (2010k:34103)},
MRREVIEWER = {Alexei Yu. Karlovich},
       DOI = {10.1016/j.jsc.2009.09.002},
       URL = {http://dx.doi.org/10.1016/j.jsc.2009.09.002},
}