| article html file updated | 8 February 2020 22:43 CET | Update | https://www.mdpi.com/1996-1073/10/12/1981 |
| article html file updated | 28 September 2019 21:11 CEST | Update | - |
| article html file updated | 2 May 2019 11:35 CEST | Update | - |
| article html file updated | 18 April 2019 09:12 CEST | Update | - |
| article html file updated | 2 January 2018 18:48 CET | Update | - |
| article html file updated | 30 November 2017 17:30 CET | Original file | - |
| article xml uploaded. | 30 November 2017 17:09 CET | Update | https://www.mdpi.com/1996-1073/10/12/1981/xml |
| article xml uploaded. | 30 November 2017 17:09 CET | Original file | - |
| article pdf uploaded. | 30 November 2017 17:09 CET | Version of Record | https://www.mdpi.com/1996-1073/10/12/1981/pdf |
