• DOI http://dx.doi.org/10.18177/sym.2015.55.rev.10879
  • PDF https://www.jstor.org/stable/26574412

  • DOI http://dx.doi.org/10.18177/sym.2015.55.itm.10875
  • PDF https://www.jstor.org/stable/26574397

  • DOI http://dx.doi.org/10.18177/sym.2015.55.rev.10874
  • PDF https://www.jstor.org/stable/26574410

  • DOI http://dx.doi.org/10.18177/sym.2015.55.sr.10872
  • PDF https://www.jstor.org/stable/26574395

  • DOI http://dx.doi.org/10.18177/sym.2015.55.sr.10871
  • PDF https://www.jstor.org/stable/26574401