• DOI https://doi.org/10.18177/sym.2017.57.itm.11345
  • PDF https://www.jstor.org/stable/26574466

  • DOI https://doi.org/10.18177/sym.2017.57.itm.11340
  • PDF https://www.jstor.org/stable/26574455

  • DOI https://doi.org/10.18177/sym.2017.57.mbi.11341
  • PDF https://www.jstor.org/stable/26574465

  • DOI https://doi.org/10.18177/sym.2017.57.mbi.11337
  • PDF https://www.jstor.org/stable/26574463