@book{ BB29547382,
  author    = "Schassberger, Rolf",
  title     = "A broad analysis of priority queues with several independent input streams",
  publisher = "University of Calgary, Department of Mathematics",
  year      = "1973",
  series    = "Research paper",
  number    = "no. 183",
  URL       = "https://ci.nii.ac.jp/ncid/BB29547382"
}