• DOI https://doi.org/10.18177/sym.2020.60.sr.11480
  • PDF https://www.jstor.org/stable/26919803

  • DOI http://dx.doi.org/10.18177/sym.2016.56.fr.11124
  • PDF https://www.jstor.org/stable/26574452

  • DOI http://dx.doi.org/10.18177/sym.2015.55.fr.10885
  • PDF https://www.jstor.org/stable/26574416

  • DOI http://dx.doi.org/10.18177/sym.2013.53.fr.10372
  • PDF https://www.jstor.org/stable/26564927
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