| article html file updated | 7 February 2020 14:23 CET | Update | https://www.mdpi.com/1424-8220/16/9/1420 |
| article html file updated | 5 May 2019 05:12 CEST | Update | - |
| article html file updated | 27 March 2019 15:54 CET | Update | - |
| article html file updated | 27 September 2016 06:57 CEST | Update | - |
| article html file updated | 2 September 2016 12:37 CEST | Original file | - |
| article xml uploaded. | 2 September 2016 12:36 CEST | Update | https://www.mdpi.com/1424-8220/16/9/1420/xml |
| article xml uploaded. | 2 September 2016 12:36 CEST | Original file | - |
| article pdf uploaded. | 2 September 2016 12:36 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/9/1420/pdf |
