| article html file updated | 7 February 2020 20:48 CET | Update | https://www.mdpi.com/2072-6643/9/1/39 |
| article html file updated | 22 September 2019 17:59 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:45 CEST | Update | N/A |
| article html file updated | 7 February 2017 12:26 CET | Update | N/A |
| article html file updated | 5 January 2017 03:39 CET | Original file | N/A |
| article xml uploaded. | 5 January 2017 03:38 CET | Original file | https://www.mdpi.com/2072-6643/9/1/39/xml |
| article pdf uploaded. | 5 January 2017 03:38 CET | Version of Record | https://www.mdpi.com/2072-6643/9/1/39/pdf |
