| article html file updated | 7 February 2020 07:25 CET | Update | https://www.mdpi.com/1996-1073/9/4/284 |
| article html file updated | 5 May 2019 18:21 CEST | Update | - |
| article html file updated | 27 March 2019 02:10 CET | Update | - |
| article html file updated | 28 April 2016 07:57 CEST | Update | - |
| article html file updated | 18 April 2016 09:50 CEST | Original file | - |
| article xml uploaded. | 18 April 2016 09:49 CEST | Update | https://www.mdpi.com/1996-1073/9/4/284/xml |
| article pdf uploaded. | 18 April 2016 09:49 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/284/pdf |
