1. Bourdaire , J.M. R.J. Byramjee R. Pattinson 1985 “Reserve assessment under uncertainty - a new approach”; Oil & Gas Journal June 10, 135-140
2. Cozzolino , J. 1977 A Simplified Utility Framework for the Analysis of Financial Risk, Economics and Evaluation Symposium of the Society of Petroleum Engineers, Dallas, Texas. Paper 6359
3. Crystal Ball program, Manual of risk Assessment 1994
4. Federation International des Ingenieurs-Conseils Client/consultant Model Service agreement , Part I standard conditions, 1990