1. Surface spread of flame test for materials, B.S. 476: Part 7, British Standards Institution.
2. Fire characteristics of building materials, DIN 4102, Deutsches Institute für Normung.
3. Building materials. Reaction to fire test. Radiation test for rigid materials, NF-P92-501, Association Française de Normalisation.
4. Method of test for surface burning characteristics of building materials, E84: 61, American Society for Testing Materials.