@article{schottky:1903:umt,
    author = {Schottky, F.},
     title = {\"{U}ber die {M}oduln der {T}hetafunctionen},
   journal = {Acta Math.},
  fjournal = {Acta Mathematica},
    volume = {27},
      year = {1903},
    number = {1},
     pages = {235–288},
      issn = {0001-5962},
     coden = {ACMAA8},
   mrclass = {Contributed Item},
  mrnumber = {MR1554985},
       doi = {10.1007/BF02421309},
     zblno = {34.0506.03}}