Item deposited via Symplectic Elements by user: Lesa Maclean HR Feed Proprietary ID: E5110873 EmailLesa.Maclean@vu.edu.au ---------- Elements publication ID: 416365 ---------- Open access permissions on article landing page (https://lematematiche.dmi.unict.it/index.php/lematematiche/article/view/940): "Le Matematiche" published articlesa are distribuited with Creative Commons Attribution 4.0 International. You are free to copy, distribute and transmit the work, and to adapt the work. You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work)." LM 27/05/20 ----------