| article html file updated | 7 February 2020 21:07 CET | Update | https://www.mdpi.com/1996-1073/10/1/73 |
| article html file updated | 22 September 2019 19:39 CEST | Update | - |
| article html file updated | 4 May 2019 16:05 CEST | Update | - |
| article html file updated | 7 February 2017 09:52 CET | Update | - |
| article html file updated | 10 January 2017 11:57 CET | Original file | - |
| article xml uploaded. | 10 January 2017 11:56 CET | Original file | https://www.mdpi.com/1996-1073/10/1/73/xml |
| article pdf uploaded. | 10 January 2017 11:56 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/73/pdf |
