• DOI https://doi.org/10.18177/sym.2020.60.sr.11498
  • PDF https://www.jstor.org/stable/26989791

  • DOI https://doi.org/10.18177/sym.2020.60.sr.11477
  • PDF https://www.jstor.org/stable/26919806

  • DOI http://dx.doi.org/10.18177/sym.2016.56.sr.11145
  • PDF https://www.jstor.org/stable/26574420

  • DOI http://dx.doi.org/10.18177/sym.2016.56.sr.11126
  • PDF https://www.jstor.org/stable/26574430