| article html file updated | 7 February 2020 20:00 CET | Update | https://www.mdpi.com/1996-1073/9/12/1091 |
| article html file updated | 22 September 2019 13:33 CEST | Update | - |
| article html file updated | 4 May 2019 18:27 CEST | Update | - |
| article html file updated | 28 December 2016 09:11 CET | Update | - |
| article html file updated | 20 December 2016 12:32 CET | Original file | - |
| article xml uploaded. | 20 December 2016 12:30 CET | Update | https://www.mdpi.com/1996-1073/9/12/1091/xml |
| article xml uploaded. | 20 December 2016 12:30 CET | Update | - |
| article xml uploaded. | 20 December 2016 12:30 CET | Original file | - |
| article pdf uploaded. | 20 December 2016 12:30 CET | Version of Record | https://www.mdpi.com/1996-1073/9/12/1091/pdf |
