| article html file updated | 7 February 2020 10:07 CET | Update | https://www.mdpi.com/1996-1073/9/6/453 |
| article html file updated | 5 May 2019 13:03 CEST | Update | - |
| article html file updated | 27 March 2019 07:23 CET | Update | - |
| article html file updated | 28 June 2016 09:33 CEST | Update | - |
| article html file updated | 14 June 2016 22:46 CEST | Original file | - |
| article xml uploaded. | 14 June 2016 09:00 CEST | Update | https://www.mdpi.com/1996-1073/9/6/453/xml |
| article pdf uploaded. | 14 June 2016 09:00 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/453/pdf |
