@article{muller:1963:aep,
    author = {M{\"u}ller, Harald J. W.},
     title = {Asymptotic expansions of prolate spheroidal wave functions and
              their characteristic numbers},
   journal = {J. Reine Angew. Math.},
    volume = {212},
      year = {1963},
     pages = {26–48},
   mrclass = {33.28},
  mrnumber = {MR0166415 (29 \#3691)},
mrreviewer = {J. Meixner},
     zblno = {0113.28002}}