1. ?Solid-Phase Forming (Cold Forming; of Plastics,? Plastics Report R42, Plastics Technical Evaluation Center, Picatinny Arsenal, N.J. (January 1972).
2. ?Modern Plastics Encyclopedia 1976-1977,? p. 53, (1976).
3. ?Sheet Metal Forming Definitions,? prepared by the American Deep Drawing Research Group, Amer. Soc. for Metals.
4. Cold forming of plastics part I. Draw forming of thermoplastic sheets