| article html file updated | 8 February 2020 06:42 CET | Update | https://www.mdpi.com/2072-6643/9/6/540 |
| article html file updated | 25 September 2019 00:21 CEST | Update | - |
| article html file updated | 3 May 2019 20:24 CEST | Update | - |
| article html file updated | 29 June 2017 11:41 CEST | Update | - |
| article html file updated | 25 May 2017 13:40 CEST | Original file | - |
| article xml uploaded. | 25 May 2017 13:39 CEST | Original file | https://www.mdpi.com/2072-6643/9/6/540/xml |
| article pdf uploaded. | 25 May 2017 13:39 CEST | Version of Record | https://www.mdpi.com/2072-6643/9/6/540/pdf |
