1. Dental Elastic Impression Materials. ISO Specification 4823.
2. Phillips RW (1990) Skinners Science of Dental Materials, 9th edn. WB Saunders, Philadelphia, pill
3. Braden M (1975) Impression Materials. In: von Fraunhoffer IA (ed) Scientific Aspects of Dental Materials. Butterworths, London
4. Owen CP, Goolam R (1993) Int I Prosthodont 6:480
5. Purrman R, Schmidt W (1964) British Patent 1044 753. Espe Fabrik Praparate