| article html file updated | 7 February 2020 09:14 CET | Update | https://www.mdpi.com/1996-1073/9/6/396 |
| article html file updated | 5 May 2019 14:46 CEST | Update | - |
| article html file updated | 27 March 2019 05:41 CET | Update | - |
| article html file updated | 28 June 2016 09:23 CEST | Update | - |
| article html file updated | 25 May 2016 09:55 CEST | Original file | - |
| article xml uploaded. | 25 May 2016 09:51 CEST | Update | https://www.mdpi.com/1996-1073/9/6/396/xml |
| article pdf uploaded. | 25 May 2016 09:51 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/396/pdf |
