| article html file updated | 7 February 2020 20:48 CET | Update | https://www.mdpi.com/1996-1073/10/1/52 |
| article html file updated | 22 September 2019 18:00 CEST | Update | - |
| article html file updated | 4 May 2019 16:45 CEST | Update | - |
| article html file updated | 7 February 2017 09:44 CET | Update | - |
| article html file updated | 5 January 2017 08:45 CET | Original file | - |
| article xml uploaded. | 5 January 2017 08:44 CET | Original file | https://www.mdpi.com/1996-1073/10/1/52/xml |
| article pdf uploaded. | 5 January 2017 08:44 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/52/pdf |
