@incollection{Li_Calzi_2012,
doi = {10.1007/978-88-470-2427-4_18},
url = {https://doi.org/10.1007%2F978-88-470-2427-4_18},
year = 2012,
publisher = {Springer Milan},
pages = {187--196},
author = {Marco Li Calzi},
title = {E Pluribus Unum},
booktitle = {Imagine Math}
}