@book{ international1991iaea, title={Case Study on the Use of Psa Methods: Backfitting Decisions}, series={TECDOC Series}, number={591}, year={1991}, url={http://www.dgdingfa.net/publications/847/case-study-on-the-use-of-psa-methods-backfitting-decisions}, publisher={INTERNATIONAL ATOMIC ENERGY AGENCY}, address={Vienna} }