1. American Dental Association, “American National Standards Institute Document 41a for recommended standard practices for biological evaluation of dental materials,” 1982.
2. Association Francaise de Normalisation, “Evaluation biologique des produits dentaires,” S 91, 224, ISO/TR 7405, 1985.
3. British Standards Institution, “British standard methods for biological assessment of dental materials,” BS 5828, London, 1989.