• DOI http://dx.doi.org/10.18177/sym.2013.53.fr.9699
  • PDF https://www.jstor.org/stable/26564929

  • DOI http://dx.doi.org/10.18177/sym.2013.53.rev.9698
  • PDF https://www.jstor.org/stable/26564923

  • DOI http://dx.doi.org/10.18177/sym.2012.52.sr.924
  • PDF https://www.jstor.org/stable/26564877

  • DOI http://dx.doi.org/10.18177/sym.2011.51.sr.19
  • PDF https://www.jstor.org/stable/26513060

  • PDF https://www.jstor.org/stable/25664806