| article html file updated | 12 February 2020 20:25 CET | Update | https://www.mdpi.com/2226-471X/4/2/40 |
| article html file updated | 22 October 2019 01:55 CEST | Update | - |
| article html file updated | 19 June 2019 03:41 CEST | Update | - |
| article pdf uploaded. | 19 June 2019 03:40 CEST | Updated version of record | https://www.mdpi.com/2226-471X/4/2/40/pdf |
| article xml uploaded. | 19 June 2019 03:40 CEST | Update | https://www.mdpi.com/2226-471X/4/2/40/xml |
| article xml file uploaded | 19 June 2019 03:40 CEST | Update | - |
| article html file updated | 18 June 2019 11:20 CEST | Original file | - |
| article xml file uploaded | 18 June 2019 11:19 CEST | Original file | - |
