• DOI https://doi.org/10.18177/sym.2016.56.fr.11155
  • PDF https://www.jstor.org/stable/26574449

  • PDF https://www.jstor.org/stable/40374516

  • PDF https://www.jstor.org/stable/40374489

  • PDF https://www.jstor.org/stable/40374480

  • PDF https://www.jstor.org/stable/40374329
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