@PREAMBLE{ "\newcommand{\noopsort}[1]{}" }

@STRING{CUP = {Cambridge University Press}}
@STRING{OUP = {Oxford University Press}}
@STRING{PUP = {Princeton University Press}}
@STRING{SV = {Springer-Verlag}}
@STRING{AP = {Academic Press}}
@STRING{AMS = {American Mathematical Society}}

@misc{wiki:Karoubi-Envelope,
   author = "Wikipedia",
   title = "Karoubi envelope --- Wikipedia{,} The Free Encyclopedia",
   year = "2006",
   _note = "{\tt http://\linebreak[0]en.wikipedia.org/w/\linebreak[0]index.php?\linebreak[0]title=Karoubi\_envelope{\&}\linebreak[0]oldid=51453957}",
   note = "[\href{http://en.wikipedia.org/w/index.php?title=Karoubi_envelope&oldid=51453957}{Online}; accessed 20-June-2006]"
}

This is the book in which the Karoubi envelope construction was first described.
@book {MR0166240,
    AUTHOR = {Freyd, Peter},
     TITLE = {Abelian categories. {A}n introduction to the theory of
              functors},
    SERIES = {Harper's Series in Modern Mathematics},
 PUBLISHER = {Harper \& Row Publishers},
   ADDRESS = {New York},
      YEAR = {1964},
     PAGES = {xi+164},
   MRCLASS = {18.15},
  MRNUMBER = {MR0166240 (29 \#3517)},
MRREVIEWER = {A. Heller},
note = {\mathscinet{MR0166240}},
}

An overview of motivic cohomology; the Karoubi envelope construction is mentioned, although not by name.
@article {MR2104916,
    AUTHOR = {Mazur, Barry},
     TITLE = {What is {$\ldots$} a motive?},
   JOURNAL = {Notices Amer. Math. Soc.},
  FJOURNAL = {Notices of the American Mathematical Society},
    VOLUME = {51},
      YEAR = {2004},
    NUMBER = {10},
     PAGES = {1214--1216},
      ISSN = {0002-9920},
     CODEN = {AMNOAN},
   MRCLASS = {14F42},
  MRNUMBER = {MR2104916},
  note = {\mathscinet{MR2104916}},
}

@article {karoubi,
    AUTHOR = {Bar-Natan, Dror and Morrison, Scott},
     TITLE = {The {K}aroubi envelope and {L}ee's degeneration of {K}hovanov
              homology},
   JOURNAL = {Algebr. Geom. Topol.},
  FJOURNAL = {Algebraic \& Geometric Topology},
    VOLUME = {6},
      YEAR = {2006},
     PAGES = {1459--1469 (electronic)},
      ISSN = {1472-2747},
   MRCLASS = {57M27 (18E05 57M25)},
  MRNUMBER = {MR2253455},
MRREVIEWER = {Thomas E. Mark},
     note  = {\arxiv{math.GT/0606542} \mathscinet{MR2253455}},
    }

@misc{math.QA/9909027,
    title = {{Planar algebras, I}},
    author = {Vaughan F. R. Jones},
    note   = {\arxiv{math.QA/9909027}}}