| article html file updated | 7 February 2020 16:42 CET | Update | https://www.mdpi.com/2227-9067/3/4/19 |
| article html file updated | 22 September 2019 03:29 CEST | Update | - |
| article html file updated | 5 May 2019 01:01 CEST | Update | - |
| article html file updated | 27 December 2016 02:26 CET | Update | - |
| article html file updated | 20 October 2016 11:11 CEST | Original file | - |
| article xml uploaded. | 20 October 2016 11:10 CEST | Update | https://www.mdpi.com/2227-9067/3/4/19/xml |
| article xml uploaded. | 20 October 2016 11:10 CEST | Original file | - |
| article pdf uploaded. | 20 October 2016 11:10 CEST | Version of Record | https://www.mdpi.com/2227-9067/3/4/19/pdf |
