Weibull analysis
                models              are discussed in The American Statistician, February 2011, Vol.
              65, No.
              1 pp.44-54
                             Hirose, H. (1991),
                    Computational Statistics & Data Analysis,
              11, 309−331.  
Hirose, H. (1996), IEEE Transactions on Dielectrics and Electrical Insulation,
3 (1), 43−55. 
Hirose, H., and Lai, T. L. (1997), Technometrics,
39 (2), 199−210. 
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