| article html file updated | 11 February 2020 08:22 CET | Update | https://www.mdpi.com/2227-9067/6/1/9 |
| article html file updated | 27 April 2019 07:50 CEST | Update | N/A |
| article html file updated | 13 April 2019 03:56 CEST | Update | N/A |
| article html file updated | 3 April 2019 02:05 CEST | Update | N/A |
| article html file updated | 15 January 2019 10:20 CET | Update | N/A |
| article pdf uploaded. | 15 January 2019 10:18 CET | Updated version of record | https://www.mdpi.com/2227-9067/6/1/9/pdf |
| article html file updated | 11 January 2019 14:21 CET | Original file | N/A |
| article xml uploaded. | 11 January 2019 14:19 CET | Original file | https://www.mdpi.com/2227-9067/6/1/9/xml |
| article pdf uploaded. | 11 January 2019 14:19 CET | Version of Record | N/A |
