• DOI http://dx.doi.org/10.18177/sym.2014.54.fr.10548
  • PDF https://www.jstor.org/stable/26574389

  • PDF https://www.jstor.org/stable/40374293

  • PDF https://www.jstor.org/stable/40373956

  • PDF https://www.jstor.org/stable/40373861