| article html file updated | 7 February 2020 06:39 CET | Update | https://www.mdpi.com/1996-1944/9/4/257 |
| article html file updated | 5 May 2019 19:55 CEST | Update | - |
| article html file updated | 27 March 2019 00:44 CET | Update | - |
| article html file updated | 28 April 2016 10:53 CEST | Update | - |
| article html file updated | 31 March 2016 09:04 CEST | Original file | - |
| article xml uploaded. | 31 March 2016 09:02 CEST | Original file | https://www.mdpi.com/1996-1944/9/4/257/xml |
| article pdf uploaded. | 31 March 2016 09:02 CEST | Version of Record | https://www.mdpi.com/1996-1944/9/4/257/pdf |
