| article html file updated | 7 February 2020 06:39 CET | Update | https://www.mdpi.com/2218-2004/4/2/12 |
| article html file updated | 5 May 2019 19:56 CEST | Update | - |
| article html file updated | 27 March 2019 00:43 CET | Update | - |
| article html file updated | 1 July 2016 10:02 CEST | Update | - |
| article html file updated | 30 March 2016 13:26 CEST | Original file | - |
| article xml uploaded. | 30 March 2016 13:25 CEST | Update | https://www.mdpi.com/2218-2004/4/2/12/xml |
| article pdf uploaded. | 30 March 2016 13:25 CEST | Version of Record | https://www.mdpi.com/2218-2004/4/2/12/pdf |
