| article html file updated | 7 February 2020 18:46 CET | Update | https://www.mdpi.com/1424-8220/16/12/2021 |
| article html file updated | 4 May 2019 21:01 CEST | Update | N/A |
| article html file updated | 27 December 2016 12:45 CET | Update | N/A |
| article html file updated | 29 November 2016 12:58 CET | Original file | N/A |
| article xml uploaded. | 29 November 2016 12:56 CET | Update | https://www.mdpi.com/1424-8220/16/12/2021/xml |
| article xml uploaded. | 29 November 2016 12:56 CET | Original file | N/A |
| article pdf uploaded. | 29 November 2016 12:56 CET | Version of Record | https://www.mdpi.com/1424-8220/16/12/2021/pdf |
