| article html file updated | 6 February 2020 22:27 CET | Update | https://www.mdpi.com/1996-1073/8/9/9640 |
| article html file updated | 6 May 2019 12:02 CEST | Update | - |
| article html file updated | 26 March 2019 10:05 CET | Update | - |
| article html file updated | 12 October 2015 10:31 CEST | Update | - |
| article xml file uploaded | 12 October 2015 10:31 CEST | Update | https://www.mdpi.com/1996-1073/8/9/9640/xml |
| article html file updated | 24 September 2015 11:58 CEST | Original file | - |
| article xml file uploaded | 24 September 2015 11:58 CEST | Original file | - |
| article pdf uploaded. | 3 September 2015 15:21 CEST | Version of Record | https://www.mdpi.com/1996-1073/8/9/9640/pdf |
