| article html file updated | 7 February 2020 17:04 CET | Update | https://www.mdpi.com/2073-4395/6/4/49 |
| article html file updated | 22 September 2019 04:02 CEST | Update | - |
| article html file updated | 5 May 2019 00:18 CEST | Update | - |
| article html file updated | 29 December 2016 04:30 CET | Update | - |
| article html file updated | 27 October 2016 09:03 CEST | Original file | - |
| article xml uploaded. | 27 October 2016 09:02 CEST | Original file | https://www.mdpi.com/2073-4395/6/4/49/xml |
| article pdf uploaded. | 27 October 2016 09:02 CEST | Version of Record | https://www.mdpi.com/2073-4395/6/4/49/pdf |
