1. Sitting, M. (1981) Organic and Polymer Waste Reclaiming Encyclopedia, Noyes Data Corpn, NJ.
2. Liedner, J. (1981) Plastic Waste, Recovery of Economic Value, Marcel Dekker Inc., New York.
3. Michels, C. (1976) Textiltechnik, 26, 343–346.
4. Wagner, R. (1979) Fibre Producer, 7(2), 34.
5. Milgrom, J. (1982) Polym. Plast. Technol. Eng., 18(2), 167–178.