%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 12-2-4 on page 693.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{255.0pt}

% small headings for the example
\makeatletter
\renewcommand\section{\@startsection{section}{1}{\z@}%
                                    {1.25ex \@plus1ex \@minus.2ex}%
                                    {.8ex}%
                                    {\normalsize\bfseries}}
%
% This example is one of the few that are slightly faked:
%
% Since we want to show the use of the openbib class option
% we pretend that this is what we call by showing a faked
% document class line that we gobble up with this:
%
\renewcommand\documentclass[2][]{}
%
% The work of the openbib option is to redefine \@openbib@code
% so we just do that manually here:
%
\renewcommand\@openbib@code{%
      \advance\leftmargin\bibindent
      \itemindent -\bibindent
      \listparindent \itemindent
      \parsep \z@
      }%
   \renewcommand\newblock{\par}
\makeatother

\StartShownPreambleCommands
\documentclass[openbib]{article}
\bibliographystyle{abbrv}
\setlength\bibindent{24pt}

\makeatletter
\renewcommand\@biblabel[1]
             {\textsuperscript{#1}}
\makeatother
\StopShownPreambleCommands
\begin{document}
\nocite{LWC99,Knuth:TB10-1-31}
\bibliography{tex}
\end{document}