@article{ramanujan:1921:cpp,
    author = {Ramanujan, S.},
     title = {Congruence properties of partitions},
   journal = {Math. Z.},
  fjournal = {Mathematische Zeitschrift},
    volume = {9},
      year = {1921},
    number = {1-2},
     pages = {147–153},
      issn = {0025-5874},
     coden = {MAZEAX},
   mrclass = {Contributed Item},
  mrnumber = {MR1544457},
      issn = {0025-5874},
       doi = {10.1007/BF01378341},
     zblno = {48.0150.02}}