| article html file updated | 7 February 2020 12:53 CET | Update | https://www.mdpi.com/1996-1073/9/8/620 |
| article html file updated | 5 May 2019 07:54 CEST | Update | - |
| article html file updated | 27 March 2019 12:45 CET | Update | - |
| article html file updated | 25 August 2016 11:31 CEST | Update | - |
| article html file updated | 5 August 2016 11:32 CEST | Original file | - |
| article xml uploaded. | 5 August 2016 11:31 CEST | Update | https://www.mdpi.com/1996-1073/9/8/620/xml |
| article pdf uploaded. | 5 August 2016 11:31 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/8/620/pdf |
