@book{dingle:1973:aet,
    author = {Dingle, R. B.},
     title = {Asymptotic Expansions: Their Derivation and Interpretation},
 publisher = {Academic Press},
   address = {London-New York},
      year = {1973},
     pages = {xv+521},
   mrclass = {41A60},
  mrnumber = {MR0499926 (58 \#17673)},
     zblno = {0279.41030}}