| article html file updated | 5 February 2020 18:07 CET | Update | https://www.mdpi.com/1996-1073/4/9/1337 |
| article html file updated | 8 May 2019 23:09 CEST | Update | - |
| article html file updated | 20 March 2019 09:34 CET | Update | - |
| article html file updated | 19 July 2017 08:02 CEST | Update | - |
| article html file updated | 19 July 2017 08:01 CEST | Update | - |
| article html file updated | 19 July 2017 08:00 CEST | Original file | - |
| article xml uploaded. | 19 July 2017 07:59 CEST | Original file | https://www.mdpi.com/1996-1073/4/9/1337/xml |
