1. Amendola, A., & Chaugny, M. (1994). Gravity scales for classifying chemical accidents. In Proceedings of the 7th ESReDA Seminar on Accident Analysis. Ispra. Espoo: ESReDA.
2. Claus, P.G. (1996). (Marcogaz) Natural gas pipelines: a scene of safety. In Proceedings of OECD Workshop on Pipelines. Oslo. Paris: OECD.
3. Council Directive (1997). Council Directive, 96/82/EC of 9 December 1996 on the control of major accident hazards involving dangerous substances. Luxembourg: Official Journal of the European Communities.
4. The competent PIG;Cullen;Pipes and Pipelines International,1996
5. EGIG (1993). Gas pipeline incidents, European Gas Pipeline Incident Group, report 1970–1992. Groningen: EGIG.