1. Proceedings of First Symposium on Line Pipe Research, Cat. No. L3000, American Gas Association, Inc., New York, New York, 1965.
2. Proceedings of Fourth Symposium on Line Pipe Research, Cat. No. L30075, American Gas Association, Inc., New York, New York, 1969.
3. Coors, P. Ph. C., Fearnehough, G. D., Koch, F. O., Kugler, J., Venzi, S. and Vogt, G. H., “European Cooperative Pipeline Fracture Propagation Research”1979.
4. Sih, G. C., “Fracture Toughness Concepts”, American Society for Testing and Materials, STP 605, pp. 3–15, 1976.
5. Bonomo, F., Bramante, M., Radicchi, M. and Salmoni, G.,CSM Facility for Full-Scale Tests on 56 Diameter Pipes for Gas Transmittion: First,Test,Centro Sperimentale Metallurgico Technical Report, September 1975