| article html file updated | 8 February 2020 20:02 CET | Update | https://www.mdpi.com/2073-4409/6/4/40 |
| article html file updated | 28 September 2019 03:55 CEST | Update | - |
| article html file updated | 2 May 2019 17:38 CEST | Update | - |
| article html file updated | 4 January 2018 03:46 CET | Update | - |
| article html file updated | 4 January 2018 03:46 CET | Update | - |
| article xml uploaded. | 4 January 2018 03:45 CET | Update | https://www.mdpi.com/2073-4409/6/4/40/xml |
| article html file updated | 2 January 2018 09:35 CET | Update | - |
| article html file updated | 1 November 2017 12:25 CET | Original file | - |
| article xml uploaded. | 1 November 2017 12:23 CET | Update | - |
| article xml uploaded. | 1 November 2017 12:23 CET | Original file | - |
| article pdf uploaded. | 1 November 2017 12:23 CET | Version of Record | https://www.mdpi.com/2073-4409/6/4/40/pdf |
