About this article
Published Online: Sep 13, 2017
Page range: 5 - 55
Received: Jan 03, 2017
Accepted: Mar 28, 2017
DOI: https://doi.org/10.1515/amsil-2017-0005
© 2017
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Arrigo Cellina
Dipartimento di Matematica e Applicazioni, Università degli Studi di Milano-Bicocca, Via R. Cozzi 53, I-20125Milano, Italy