@article{olver:1993:eia,
    author = {Olver, F. W. J.},
     title = {Exponentially-improved asymptotic solutions of ordinary
              differential equations  {I}: {T}he confluent hypergeometric
              function},
   journal = {SIAM J. Math. Anal.},
  fjournal = {SIAM Journal on Mathematical Analysis},
    volume = {24},
      year = {1993},
    number = {3},
     pages = {756–767},
      issn = {0036-1410},
     coden = {SJMAAH},
   mrclass = {34E05 (33C15)},
  mrnumber = {94c:34082},
mrreviewer = {Hussain S. Nur},
       doi = {10.1137/0524046},
     zblno = {0779.34048}}