Paper  bibtex   

@book{Knuth2004,
  author    = {Knuth, Donald Ervin},
  title     = {{Robert W Floyd, In Memoriam}},
  journal = {IEEE Annals of the History of Computing},
 Publisher = {IEEE Computer Society},
  ISSN = {1058-6180},
  pages = {75--83},
  year = {2004},
  month = {April--June},
  url = {http://is.gd/KoMoXU},
  urldate= {2015-10-11},
  annote = {
    http://ieeexplore.ieee.org/ielx5/85/28875/01299661.pdf?arnumber=1299661
  }
}