@article{okamoto:1986:spe,
    author = {Okamoto, Kazuo},
     title = {Studies on the {P}ainlev\'e equations. {III}. {S}econd and
              fourth {P}ainlev\'e equations, {$P_{{\rm II}}$} and
              {$P_{\mathrm{IV}}$}},
   journal = {Math. Ann.},
  fjournal = {Mathematische Annalen},
    volume = {275},
      year = {1986},
    number = {2},
     pages = {221–255},
      issn = {0025-5831},
     coden = {MAANA},
   mrclass = {58F05 (34C20 58F35)},
  mrnumber = {MR0854008 (88m:58064)},
mrreviewer = {H{\'e}l{\`e}ne Airault},
       doi = {10.1007/BF01458459},
     zblno = {0589.58008}}