@book{  TeX,
        author= {D.K. Knuth},
        title= {The {\rm T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}book},
        publisher= {Addison-Wesley},
        year= {1989},
        ISBN= {0-201-13448-9},
        }
@book{  LaTeX,
        author= {Leslie Lamport},
        title= {\LaTeX: User's Guide and Reference Manual},
        publisher= {Addison-Wesley},
        year= {1986},
        ISBN= {0-201-15709-X},
        }
@book{  LaTeXD,
        author= {Helmut Kopka},
        title= {\LaTeX, eine Einfuehrung},
        publisher= {Addison-Wesley},
        year= {1989},
        ISBN= {3-89319-199-2},
        }