Questo e` il preambolo:
`\documentclass[12pt,a4paper,oneside]{amsbook}
\usepackage{amsmath}
\usepackage[english]{babel}
\usepackage{fancyhdr}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage[dvips]{graphicx}
\usepackage{mathrsfs}
\usepackage{acronym}
\usepackage{subfigure}
% redefinition of the bibliography environment
\makeatletter
\renewenvironment{thebibliography}[1]
{\subsection{\bibname}%
\list{\@biblabel{\@arabic\c@enumiv}}%
{\settowidth\labelwidth{\@biblabel{#1}}%
\leftmargin\labelwidth
\advance\leftmargin\labelsep
\@openbib@code
\usecounter{enumiv}%
\let\p@enumiv\@empty
\renewcommand\theenumiv{\@arabic\c@enumiv}}%
\sloppy
\clubpenalty4000
\@clubpenalty \clubpenalty
\widowpenalty4000%
\sfcode`\.\@m}
{\def\@noitemerr
{\@latex@warning{Empty `thebibliography' environment}}%
\endlist}
\makeatother`
e questa e` la sezione in cui inserisco la bibliografia:
`
\chapter{Uno}
\section{Reference documents}
The following documents can be consulted as they contain relevant information:
\begin{thebibliography}{99}
\bibitem[R1]{R1}Annalisa Riccardi, \textit{“Ciao''} 2009.
\end{thebibliography}
`
Any idea why it doesn´t compile?
Grazie mille!
Lisa