| article html file updated | 7 February 2020 21:02 CET | Update | https://www.mdpi.com/1996-1073/10/1/69 |
| article html file updated | 22 September 2019 19:21 CEST | Update | - |
| article html file updated | 4 May 2019 16:15 CEST | Update | - |
| article html file updated | 7 February 2017 09:51 CET | Update | - |
| article html file updated | 9 January 2017 03:15 CET | Original file | - |
| article xml uploaded. | 9 January 2017 03:13 CET | Original file | https://www.mdpi.com/1996-1073/10/1/69/xml |
| article pdf uploaded. | 9 January 2017 03:13 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/69/pdf |
