| article html file updated | 8 February 2020 23:59 CET | Update | https://www.mdpi.com/1996-1073/10/12/2121 |
| article html file updated | 29 September 2019 04:40 CEST | Update | - |
| article html file updated | 2 May 2019 08:46 CEST | Update | - |
| article html file updated | 18 April 2019 06:31 CEST | Update | - |
| article html file updated | 2 January 2018 20:01 CET | Update | - |
| article html file updated | 13 December 2017 12:38 CET | Original file | - |
| article xml uploaded. | 13 December 2017 12:36 CET | Update | https://www.mdpi.com/1996-1073/10/12/2121/xml |
| article xml uploaded. | 13 December 2017 12:36 CET | Original file | - |
| article pdf uploaded. | 13 December 2017 12:36 CET | Version of Record | https://www.mdpi.com/1996-1073/10/12/2121/pdf |
