| article html file updated | 7 February 2020 14:45 CET | Update | https://www.mdpi.com/2073-4344/6/9/135 |
| article html file updated | 5 May 2019 04:30 CEST | Update | - |
| article html file updated | 28 September 2016 23:00 CEST | Update | - |
| article html file updated | 9 September 2016 13:41 CEST | Original file | - |
| article xml uploaded. | 9 September 2016 13:39 CEST | Update | https://www.mdpi.com/2073-4344/6/9/135/xml |
| article xml uploaded. | 9 September 2016 13:39 CEST | Original file | - |
| article pdf uploaded. | 9 September 2016 13:39 CEST | Version of Record | https://www.mdpi.com/2073-4344/6/9/135/pdf |
