@article {MR1669815,
    AUTHOR = {Mac\'{\i}as, Sergio},
     TITLE = {On symmetric products of continua},
   JOURNAL = {Topology Appl.},
  FJOURNAL = {Topology and its Applications},
    VOLUME = {92},
      YEAR = {1999},
    NUMBER = {2},
     PAGES = {173--182},
      ISSN = {0166-8641,1879-3207},
   MRCLASS = {54B20 (54F15 54F55)},
  MRNUMBER = {1669815},
MRREVIEWER = {J.\ J.\ Charatonik},
       DOI = {10.1016/S0166-8641(97)00233-2},
       URL = {https://doi.org/10.1016/S0166-8641(97)00233-2},
}

@article {MR1562283,
    AUTHOR = {Borsuk, Karol and Ulam, Stanislaw},
     TITLE = {On symmetric products of topological spaces},
   JOURNAL = {Bull. Amer. Math. Soc.},
  FJOURNAL = {Bulletin of the American Mathematical Society},
    VOLUME = {37},
      YEAR = {1931},
    NUMBER = {12},
     PAGES = {875--882},
      ISSN = {0002-9904},
   MRCLASS = {99-04},
  MRNUMBER = {1562283},
       DOI = {10.1090/S0002-9904-1931-05290-3},
       URL = {https://doi.org/10.1090/S0002-9904-1931-05290-3},
}