@ARTICLE\{IMM2000-01921,
    author       = "A. T. Andersen and M. F. Neuts and B. F. Nielsen",
    title        = "Lower order moments of inter-transition times in the stationary {QBD} process",
    year         = "2000",
    pages        = "339-357",
    journal      = "Methodology and Computing in Applied Probability",
    volume       = "2",
    editor       = "",
    number       = "4",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1921-full.html"
}