Adisak Mekkittikul, "Scheduling Non-uniform Traffic in High Speed Packet Switches and Routers," PhD Thesis (181 pages), Stanford University, November 1998. [pdf]
Adisak Mekkittikul and Nick McKeown, "Scheduling VOQ Switches under Non-Uniform Traffic," CSL Technical Report, CSL-TR 97-747, Stanford University, 1997. [pdf]