1. Bolt R. Database reflects recent trends. Oil and Gas Journal 2001; 48–54.
2. Jones D, Kramer G, Gideon D, Eiber R. An analysis of reportable incidents for natural gas transmission and gathering lines 1970 through June 1984. Technical Report 158, Battelle Columbus Division; 1986.
3. Hopkins P, Corder I, Corbin P. The resistance of gas transmission pipelines to mechanical damage. In: CANMET International Conference on Pipeline Reliability, vol. 2. Calgary: 1992.
4. Spiekhout J, Gresnigt A, Kusters G. The behaviour of a steel cylinder under the influence of a local load in the elastic and elastic–plastic area. In: International Symposium on Shell and Spatial Structures: Computational Aspects. Leuven, Belgium: 1987. p. 329–36.
5. Roovers P, Bood R, Galli M, Marewski U, Steiner M, Zarea M. EPRG methods for the assessing of the tolerance and resistance of pipelines to external damage. In: Pipeline Technology Conference, vol. 2. Brügge, Belgium: 2000. p. 405–25.