@book{knuth:ct:e,
  author       = {Knuth, Donald E.},
  title        = {{Computer Modern} Typefaces},
  date         = 1986,
  maintitle    = {Computers \& Typesetting},
  volume       = {E},
  publisher    = {Addison-Wesley},
  location     = {Reading, Mass.},
  langid       = {english},
  langidopts   = {variant=american},
  sorttitle    = {Computers & Typesetting E},
  annotation   = {The fifth volume of a five-volume book. Note the
                  \texttt{sorttitle} field},
}