| article html file updated | 7 February 2020 23:59 CET | Update | https://www.mdpi.com/2079-6439/5/1/9 |
| article html file updated | 23 September 2019 11:13 CEST | Update | - |
| article html file updated | 4 May 2019 10:03 CEST | Update | - |
| article html file updated | 30 March 2017 03:41 CEST | Update | - |
| article html file updated | 22 February 2017 10:57 CET | Original file | - |
| article xml uploaded. | 22 February 2017 10:56 CET | Original file | https://www.mdpi.com/2079-6439/5/1/9/xml |
| article pdf uploaded. | 22 February 2017 10:56 CET | Version of Record | https://www.mdpi.com/2079-6439/5/1/9/pdf |
