| article html file updated | 6 February 2020 07:01 CET | Update | https://www.mdpi.com/2072-6651/6/2/539 |
| article html file updated | 7 May 2019 19:10 CEST | Update | - |
| article html file updated | 21 March 2019 11:45 CET | Update | - |
| article html file updated | 19 August 2015 19:06 CEST | Update | - |
| article html file updated | 18 March 2014 09:58 CET | Original file | - |
| article xml file uploaded | 18 March 2014 09:57 CET | Original file | https://www.mdpi.com/2072-6651/6/2/539/xml |
| article pdf uploaded. | 28 January 2014 11:32 CET | Version of Record | https://www.mdpi.com/2072-6651/6/2/539/pdf |
