• DOI http://dx.doi.org/10.18177/sym.2015.55.rev.10886
  • PDF https://www.jstor.org/stable/26574403

  • DOI http://dx.doi.org/10.18177/sym.2015.55.itm.10865
  • PDF https://www.jstor.org/stable/26574398

  • DOI http://dx.doi.org/10.18177/sym.2014.54.itm.10846
  • PDF https://www.jstor.org/stable/26574358

  • DOI http://dx.doi.org/10.18177/sym.2014.54.sr.10629
  • PDF https://www.jstor.org/stable/26574366

  • DOI http://dx.doi.org/10.18177/sym.2011.51.sr.14
  • PDF https://www.jstor.org/stable/26513065