| article html file updated | 7 February 2020 15:54 CET | Update | https://www.mdpi.com/2073-4468/5/4/20 |
| article html file updated | 22 September 2019 02:11 CEST | Update | - |
| article html file updated | 5 May 2019 02:27 CEST | Update | - |
| article html file updated | 29 December 2016 04:29 CET | Update | - |
| article html file updated | 1 October 2016 08:59 CEST | Original file | - |
| article xml uploaded. | 1 October 2016 08:58 CEST | Update | https://www.mdpi.com/2073-4468/5/4/20/xml |
| article xml uploaded. | 1 October 2016 08:58 CEST | Original file | - |
| article pdf uploaded. | 1 October 2016 08:58 CEST | Version of Record | https://www.mdpi.com/2073-4468/5/4/20/pdf |
