John F. Shortle Martin J. Fischer Percy H. Brill Waiting-Time Distribution of <i>M/D<sub>N</sub>/1</i> Queues Through Numerical Laplace Inversion. 112-120 2007 19 INFORMS Journal on Computing 1 http://dx.doi.org/10.1287/ijoc.1050.0148 db/journals/informs/informs19.html#ShortleFB07