@article{wang:2003:uae,
    author = {Wang, Z. and Wong, R.},
     title = {Asymptotic expansions for second-order linear difference
              equations with a turning point},
   journal = {Numer. Math.},
  fjournal = {Numerische Mathematik},
    volume = {94},
      year = {2003},
    number = {1},
     pages = {147–194},
      issn = {0029-599X},
     coden = {NUMMA7},
   mrclass = {39A05 (33C45)},
  mrnumber = {MR1971216 (2004c:39012)},
mrreviewer = {Sergey M. Zagorodnyuk},
       doi = {10.1007/s00211-002-0416-y},
     zblno = {1030.39016}}