| article html file updated | 7 February 2020 19:35 CET | Update | https://www.mdpi.com/1424-8220/16/12/2121 |
| article html file updated | 22 September 2019 11:19 CEST | Update | - |
| article html file updated | 4 May 2019 19:18 CEST | Update | - |
| article html file updated | 27 December 2016 13:07 CET | Update | - |
| article html file updated | 14 December 2016 09:03 CET | Original file | - |
| article xml uploaded. | 14 December 2016 09:02 CET | Original file | https://www.mdpi.com/1424-8220/16/12/2121/xml |
| article pdf uploaded. | 14 December 2016 09:02 CET | Version of Record | https://www.mdpi.com/1424-8220/16/12/2121/pdf |
