| article html file updated | 7 February 2020 21:34 CET | Update | https://www.mdpi.com/2072-6643/9/1/69 |
| article html file updated | 22 September 2019 21:59 CEST | Update | - |
| article html file updated | 4 May 2019 15:00 CEST | Update | - |
| article html file updated | 7 February 2017 12:29 CET | Update | - |
| article html file updated | 17 January 2017 05:14 CET | Original file | - |
| article xml uploaded. | 17 January 2017 05:13 CET | Original file | https://www.mdpi.com/2072-6643/9/1/69/xml |
| article pdf uploaded. | 17 January 2017 05:13 CET | Version of Record | https://www.mdpi.com/2072-6643/9/1/69/pdf |
