@inbook{Li_Calzi_2012,
title={E Pluribus Unum},
ISBN={9788847024274},
url={http://dx.doi.org/10.1007/978-88-470-2427-4_18},
DOI={10.1007/978-88-470-2427-4_18},
booktitle={Imagine Math},
publisher={Springer Milan},
author={Li Calzi,
Marco},
year={2012},
pages={187–196} }