| article html file updated | 7 February 2020 19:04 CET | Update | https://www.mdpi.com/1996-1073/9/12/1020 |
| article html file updated | 22 September 2019 08:46 CEST | Update | N/A |
| article html file updated | 4 May 2019 20:22 CEST | Update | N/A |
| article html file updated | 28 December 2016 08:57 CET | Update | N/A |
| article html file updated | 4 December 2016 02:31 CET | Original file | N/A |
| article xml uploaded. | 4 December 2016 02:30 CET | Original file | https://www.mdpi.com/1996-1073/9/12/1020/xml |
| article pdf uploaded. | 4 December 2016 02:30 CET | Version of Record | https://www.mdpi.com/1996-1073/9/12/1020/pdf |
