| article html file updated | 7 February 2020 10:52 CET | Update | https://www.mdpi.com/1996-1073/9/7/493 |
| article html file updated | 5 May 2019 11:39 CEST | Update | - |
| article html file updated | 27 March 2019 08:45 CET | Update | - |
| article html file updated | 27 July 2016 09:31 CEST | Update | - |
| article html file updated | 28 June 2016 09:38 CEST | Original file | - |
| article xml uploaded. | 28 June 2016 09:17 CEST | Original file | https://www.mdpi.com/1996-1073/9/7/493/xml |
| article pdf uploaded. | 28 June 2016 09:17 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/493/pdf |
