- Correspondence to Professor K Havenetidis, Physical and Cultural Studies, Hellenic Army Academy, Vari 16673, Attiki, Greece;
- Received July 1, 2020
- Revision received September 26, 2020
- Accepted September 29, 2020
- First published October 30, 2020.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.