@article{langer:1934:me,
    author = {Langer, Rudolph E.},
     title = {The solutions of the {M}athieu equation with a complex
              variable and at least one parameter large},
   journal = {Trans. Amer. Math. Soc.},
  fjournal = {Transactions of the American Mathematical Society},
    volume = {36},
      year = {1934},
    number = {3},
     pages = {637–695},
      issn = {0002-9947},
     coden = {TAMTAM},
   mrclass = {34M30 (34A25 34E05)},
  mrnumber = {MR1501760},
     links = {\URL[FullText]{http://links.jstor.org/sici?sici=0002-9947%28193407%2936%3A3%3C637%3ATSOTME%3E2.0.CO%3B2-K}},
     zblno = {0010.02104}}