| article html file updated | 7 February 2020 19:32 CET | Update | https://www.mdpi.com/2079-6412/6/4/69 |
| article html file updated | 22 September 2019 11:03 CEST | Update | - |
| article html file updated | 4 May 2019 19:25 CEST | Update | - |
| article html file updated | 28 December 2016 08:37 CET | Update | - |
| article html file updated | 14 December 2016 14:31 CET | Original file | - |
| article xml uploaded. | 14 December 2016 14:30 CET | Original file | https://www.mdpi.com/2079-6412/6/4/69/xml |
| article pdf uploaded. | 14 December 2016 14:30 CET | Version of Record | https://www.mdpi.com/2079-6412/6/4/69/pdf |
