@ARTICLE\{IMM1986-02576, author = "S. Vibholm and P. Thyregod", title = "The analysis of insulation breakdown probabilities by the up and down method", year = "1986", pages = "133-136", journal = "{IEEE} Transactions,", volume = "EI-21", editor = "", number = "", publisher = "", url = "http://www2.compute.dtu.dk/pubdb/pubs/2576-full.html" }