@mvbook{knuthDraftSectionGenerating2002,
  title = {A Draft of Section 7.2.1.1: Generating All n-Tuples},
  author = {Knuth, Donald E.},
  date = {2002-03-30},
  series = {The {{Art}} of {{Computer Programming}}},
  volume = {4a},
  langid = {english},
  pagetotal = {200},
  volumes = {5}
}