| article html file updated | 7 February 2020 13:31 CET | Update | https://www.mdpi.com/1996-1073/9/8/657 |
| article html file updated | 5 May 2019 06:46 CEST | Update | - |
| article html file updated | 27 March 2019 14:01 CET | Update | - |
| article html file updated | 25 August 2016 11:40 CEST | Update | - |
| article html file updated | 18 August 2016 11:56 CEST | Original file | - |
| article xml uploaded. | 18 August 2016 11:54 CEST | Original file | https://www.mdpi.com/1996-1073/9/8/657/xml |
| article pdf uploaded. | 18 August 2016 11:54 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/8/657/pdf |
