@article{muller:1965:ae1,
    author = {M{\"u}ller, Harald J. W.},
     title = {Asymptotic expansions of ellipsoidal wave functions and their
              characteristic numbers},
   journal = {Math. Nachr.},
    volume = {31},
      year = {1966},
     pages = {89–101},
   mrclass = {33.28},
  mrnumber = {MR0193292 (33 \#1512)},
mrreviewer = {F. M. Arscott},
       doi = {10.1002/mana.19660310108},
     zblno = {0147.05904}}