Bruno Sericola Fabrice Guillemin Jacqueline Boyer Sojourn Times in the <i>M</i>/<i>PH</i>/1 Processor Sharing Queue. 109-130 2005 50 Queueing Syst. 1 http://dx.doi.org/10.1007/s11134-005-0372-1 db/journals/questa/questa50.html#SericolaGB05