• DOI http://dx.doi.org/10.18177/sym.2016.56.fr.11136
  • PDF https://www.jstor.org/stable/26574445

  • DOI http://dx.doi.org/10.18177/sym.2016.56.fr.11137
  • PDF https://www.jstor.org/stable/26574446

  • DOI http://dx.doi.org/10.18177/sym.2016.56.fr.11138
  • PDF https://www.jstor.org/stable/26574447