@ARTICLE\{IMM1991-02578, author = "P. Thyregod and S. Vibholm", title = "On the assessment of Extremely Low Breakdown Probabilities by an Inverse Sampling procedure", year = "1991", pages = "367-377", journal = "{IEEE} transactions {EI}", volume = "EI-26", editor = "", number = "", publisher = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/2578-full.html" }