| article html file updated | 7 February 2020 11:16 CET | Update | https://www.mdpi.com/1996-1073/9/7/518 |
| article html file updated | 5 May 2019 10:55 CEST | Update | - |
| article html file updated | 27 March 2019 09:29 CET | Update | - |
| article html file updated | 27 July 2016 09:48 CEST | Update | - |
| article html file updated | 5 July 2016 13:37 CEST | Original file | - |
| article xml uploaded. | 5 July 2016 13:35 CEST | Original file | https://www.mdpi.com/1996-1073/9/7/518/xml |
| article pdf uploaded. | 5 July 2016 13:35 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/518/pdf |
