| article html file updated | 7 February 2020 18:40 CET | Update | https://www.mdpi.com/1996-1073/9/12/997 |
| article html file updated | 22 September 2019 07:12 CEST | Update | - |
| article html file updated | 4 May 2019 21:14 CEST | Update | - |
| article html file updated | 28 December 2016 08:53 CET | Update | - |
| article html file updated | 26 November 2016 08:21 CET | Original file | - |
| article xml uploaded. | 26 November 2016 08:19 CET | Update | https://www.mdpi.com/1996-1073/9/12/997/xml |
| article xml uploaded. | 26 November 2016 08:19 CET | Update | - |
| article xml uploaded. | 26 November 2016 08:19 CET | Update | - |
| article xml uploaded. | 26 November 2016 08:19 CET | Update | - |
| article xml uploaded. | 26 November 2016 08:19 CET | Original file | - |
| article pdf uploaded. | 26 November 2016 08:19 CET | Version of Record | https://www.mdpi.com/1996-1073/9/12/997/pdf |
