• Association of Turkish Polystrene Producers
  http://www.pud.org.tr

• Polystyrene Packaging Council
  http://www.polystyrene.org

• Alliance of Foam Packaging Recyclers
  http://www.epspackaging.org

• ESP Recycling International
  http://www.epsrecycling.org

• EPS Molders Association
  http://www.epsmolders.org/

• European Manufacturers of Expanded Polystyrene
  http://www.eumeps.org

• Canadian Polystyrene Recycling Association
  http://www.cpra-canada.com

• The Structural Insulated Panel Association
  http://www.sips.org/

• Foam Fabricators
  http://www.foamfabricatorsinc.com

• Learn more about Expanded Polystyrene
  video

• Wikipedia
  http://en.wikipedia.org/wiki/Polystyrene

• sourtimes.org
  http://sozluk.sourtimes.org/show.asp?id=3431778

• Worldeps
  http://www.worldeps.com