| article html file updated | 7 February 2020 17:24 CET | Update | https://www.mdpi.com/2075-4426/6/4/20 |
| article html file updated | 22 September 2019 04:33 CEST | Update | - |
| article html file updated | 4 May 2019 23:41 CEST | Update | - |
| article html file updated | 29 December 2016 11:52 CET | Update | - |
| article html file updated | 2 November 2016 14:57 CET | Update | - |
| article xml uploaded. | 2 November 2016 14:56 CET | Update | https://www.mdpi.com/2075-4426/6/4/20/xml |
| article html file updated | 2 November 2016 14:56 CET | Update | - |
| article xml uploaded. | 2 November 2016 14:55 CET | Update | - |
| article pdf uploaded. | 2 November 2016 14:50 CET | Updated version of record | https://www.mdpi.com/2075-4426/6/4/20/pdf |
| article html file updated | 2 November 2016 12:34 CET | Original file | - |
| article xml uploaded. | 2 November 2016 12:33 CET | Original file | - |
| article pdf uploaded. | 2 November 2016 12:33 CET | Version of Record | - |
