Prague, 28 June 2017
Niccolò Cusano University, Via Don Carlo Gnocchi 3, 00166
2 University of Nebraska-Lincoln, 1400 R St, Lincoln, NE 68588, USA
* e-mail: firstname.lastname@example.org
Accepted: 24 March 2017
Published online: 13 April 2017
This article has no abstract.
© A. Monti and C. Argyropoulos, Published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.