| article html file updated | 6 February 2020 00:29 CET | Update | https://www.mdpi.com/1996-1073/6/2/807 |
| article html file updated | 19 September 2019 17:48 CEST | Update | N/A |
| article html file updated | 8 May 2019 08:37 CEST | Update | N/A |
| article html file updated | 20 March 2019 18:27 CET | Update | N/A |
| article html file updated | 20 July 2017 11:22 CEST | Update | N/A |
| article html file updated | 20 July 2017 11:21 CEST | Update | N/A |
| article html file updated | 20 July 2017 11:20 CEST | Original file | N/A |
| article xml uploaded. | 20 July 2017 11:18 CEST | Update | https://www.mdpi.com/1996-1073/6/2/807/xml |
| article pdf uploaded. | 7 February 2013 10:25 CET | Version of Record | https://www.mdpi.com/1996-1073/6/2/807/pdf |
