\documentclass[secthm,AOR]{baltzer}
\usepackage{amssymb}

\begin{document}
\begin{frontmatter}
\title{Annals of Operations Research \\ Manuscript preparation}
\author{Kluwer Academic Publishers\thanks{%
http://kapis.wkap.nl/kaphtml.htm/IFA0254-5330}}

\address{The Netherlands}

\runningauthor{Kluwer A. P.}
\runningtitle{AOR Manuscript preparation}

\begin{abstract}
Submitted papers should typically be less than 15 double-spaced typewritten pages, 
including bibliographies, tables, etc. Sections should appear in the following order: 
title page, abstract, text, notes, references, tables, figure legends, and figures. 
\end{abstract}

\begin{keywords}
cooperative games, combinatorial games
\end{keywords}
\classification{91A12, 91A46}
\end{frontmatter}

\section{Title page and abstract}
The title page should include the article title, authors' names and permanent affiliations, 
and the name, current address, email address and telephone number of the person to whom 
page proofs and reprints should be sent. The following page should include an abstract 
of not more than 100 words and a list of two to six keywords.

\section{New environments}


\begin{defn}

\end{defn}


\begin{lem}

\end{lem}



\begin{thm}

\end{thm}
\begin{pf}
This is a short proof.
\end{pf}

\begin{cor}

\end{cor}


\begin{algorithm}

\end{algorithm}


\begin{prop}

\end{prop}


\begin{exmp}

\end{exmp}



\section{Bibliography}

References in the text should follow the author format (e.g. Schoemaker \cite{SCH}),  
according to the following samples journal and books.
References with up to three authors should include the names of each author, 
references with four or more authors should cite the first author and add ``et al.'' 
It is the responsibility of the authors to verify all references.

\begin{thebibliography}{99}

\bibitem{BEK} Becker, Gordon, Morris DeGroot, and Jacob Marschak. (1964). 
``Measuring Utility by a Single-Response Sequential Method,'' 
\emph{Behavioral Science} 9, 226-232.

\bibitem{SCH} Schoemaker, Paul. (1980). \emph{Experiments of Decisions Under Risk: The 
Expected Utility Hypothesis.} Boston: Kluwer-Nijhoff Publishing.

\bibitem{SMI} Smith, V. Kerry. (1986). ``A Conceptual Overview of the Foundations of 
Benefit-Cost Analysis.'' In J. Bentkover, V. Covello, and J. Mumpower (eds.), 
\emph{Benefits Assessments: The State of the Art.} Dordrecht: D. Reidel Publishing Co.

\end{thebibliography}

\end{document}