Completing projects according to plans: an earned-value improvement index. - Denis F. Cioffi (J. Oper. Res. Soc., 2006)

A practical method of determining project risk contingency budgets. - Denis F. Cioffi; Homayoun Khamooshi (J. Oper. Res. Soc., 2009)

Program Risk Contingency Budget Planning. - Homayoun Khamooshi; Denis F. Cioffi (IEEE Trans. Engineering Management, 2009)