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2. Veseley, W.E.: Fault tree handbook, (US Nuclear Regulatory Commission, Division of the System Safety Office, Washington, DC 1981)
3. Reliability prediction of electronic equipment, (US Department of Defence 1986),Department Of Defense
4. Taylor, J.R.: Fault tree and cause consequence analysis for control software validation, (Riso̸ National Laboratory, DK-4000 Rockilde, Denmark 1982)