il file tex:
`
\documentclass[a4paper,11pt,draft,openany]{book}
\usepackage[english, german, italian]{babel}
\usepackage[latin1]{inputenc}
\usepackage{microtype}
\usepackage{indentfirst}
\usepackage{enumitem}
\usepackage[square,sort]{natbib}
\usepackage[leqno]{amsmath}
\usepackage{amsthm}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{graphicx}
\usepackage{mathtools}
\begin{document}
\frontmatter
\title{Kolmogorov}
\author{Guido Mazzoni}
\date{}
\maketitle
\tableofcontents
\chapter{Introduzione}
\mainmatter
\chapter{Capitolo 1}
\cleardoublepage
\addcontentsline{toc}{chapter}{\bibname}
\nocite{*}
\bibliographystyle{classic}
\bibliography{Tesi-TeX}
\backmatter
\end{document}`
L’opzione [numeric] che usi per natbib mi produce un errore, l’opzione sembra inesistente per natbib.
Il file bib corretto:
`@article{Heyting:1930a,
author = {Arend Heyting},
title = {Die formalen Regeln der intuitionistischen Logik},
journal = {Sitzungsberichte der Preussischen Akademie der Wissenschaften \emph{(16/1/1930)}},
year = {1930},
pages = {42-56}
}
@article{Heyting:1930b,
author = {Arend Heyting},
title = {Die formalen Regeln der intuitionistischen Logik},
journal = {Sitzungsberichte der Preussischen Akademie der Wissenschaften \emph{(16/1/1930)}},
year = {1930},
pages = {57-71}
}
@article{Heyting:1930c,
author = {Arend Heyting},
title = {Die formalen Regeln der intuitionistischen Logik},
journal = {Sitzungsberichte der Preussischen Akademie der Wissenschaften \emph{(20/3/1930)}},
year = {1930},
pages = {158-169}
}
@article{Heyting:1930d,
author = {Arend Heyting},
title = {Sur la logique intuitionniste},
journal = {Acad\'emie Royale de Belgique, Bulletin de la Classe des Sciences},
year = {1930},
volume = {16},
pages = {957-963}
}`