\documentclass[a4paper,11pt]{article}
\usepackage{graphicx}
\author{H.~Partl}
\title{minimalism}
\begin{document}
\maketitle
\tableofcontents
\section{Start}
Here begins my lovely article \ldots

\section{Middle}
I added this on \today. Here is some maths $a^{1+1} + b^2 = c^2$. Here is some text.
It is apparently clear that

\begin{equation}
\sigma^2(x) = \frac{1}{n}\sum_{i = 1}^{n} (x_i - \bar{x})^2
\end{equation}

\begin{equation}
\gamma > f(x)
\label{toad}
\end{equation}
\begin{equation}
\epsilon > 0
\label{frog}
\end{equation}

It follows from Eq.~\ref{frog} that \ldots

\section{End}
\begin{figure}[ht]
\begin{center}
\includegraphics[width=100mm]{dilbert_complexpictures.pdf}
\end{center}
\caption{An example of a figure.}
\label{fig:example}
\end{figure}
\ldots{} and here it ends. 
See Figure~\ref{fig:example}.

A particularly interesting discussion may be found in \cite{Ade1983}. See also
\cite{AaK1989}.

\subsection{Really the End}
\begin{table}
\begin{center}
\begin{tabular}{lcr}
23121 & 1212 & 232 \\ \hline  
cat & frog & dog
\end{tabular}
\end{center}
\caption{An example of a table.}
\end{table}

\bibliographystyle{unsrt}
\bibliography{testbib}
\end{document}
