[2] viXra:1709.0418 submitted on 2017-09-28 07:07:18, (437 unique-IP downloads)
Authors: Carmine Cataldo
Category: Education and Didactics
[1] viXra:1709.0382 submitted on 2017-09-25 09:55:45, (949 unique-IP downloads)
Authors: Carmine Cataldo
Category: Education and Didactics