• DOI http://dx.doi.org/10.18177/sym.2016.56.rev.11114
  • PDF https://www.jstor.org/stable/26574439

  • DOI http://dx.doi.org/10.18177/sym.2015.55.fr.10883
  • PDF https://www.jstor.org/stable/26574418

  • DOI http://dx.doi.org/10.18177/sym.2015.55.sr.10881
  • PDF https://www.jstor.org/stable/26574396

  • DOI http://dx.doi.org/10.18177/sym.2015.55.sr.10871
  • PDF https://www.jstor.org/stable/26574401

  • DOI http://dx.doi.org/10.18177/sym.2015.55.rev.10862
  • PDF https://www.jstor.org/stable/26574404