| article html file updated | 7 February 2020 20:39 CET | Update | https://www.mdpi.com/1996-1073/10/1/39 |
| article html file updated | 22 September 2019 17:09 CEST | Update | - |
| article html file updated | 4 May 2019 17:06 CEST | Update | - |
| article html file updated | 7 February 2017 09:39 CET | Update | - |
| article html file updated | 1 January 2017 05:42 CET | Original file | - |
| article xml uploaded. | 1 January 2017 05:41 CET | Update | https://www.mdpi.com/1996-1073/10/1/39/xml |
| article pdf uploaded. | 1 January 2017 05:41 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/39/pdf |
