• DOI https://doi.org/10.18177/sym.2017.57.itm.11351
  • PDF https://www.jstor.org/stable/26574464

  • DOI https://doi.org/10.18177/sym.2016.56.itm.11157
  • PDF https://www.jstor.org/stable/26574425

  • DOI http://dx.doi.org/10.18177/sym.2016.56.itm.11120

  • DOI http://dx.doi.org/10.18177/sym.2015.55.mbi.10863
  • PDF https://www.jstor.org/stable/26574394