1. Goheen DF (2000) Laundry POD system can be membrane based. Water Technology 102
2. US Patent (1999) 5,868,937
3. Dell Tech Laboratories Ltd, http://www.delltech.com/ecolab_co/pdf/surlite.PDF
4. Food Services of America, http://www.fsafood.com/msds/vault/000/000573.pdf
5. Instruction Manual (1990) Hunterlab Ultrascan Sphere Spectrocolorimeter, Specware, Manual Version 1.2