| article html file updated | 6 February 2020 07:18 CET | Update | https://www.mdpi.com/1999-4915/6/2/893 |
| article html file updated | 7 May 2019 18:34 CEST | Update | - |
| article html file updated | 21 March 2019 12:26 CET | Update | - |
| article html file updated | 19 August 2015 20:35 CEST | Update | - |
| article html file updated | 18 March 2014 10:02 CET | Original file | - |
| article xml file uploaded | 18 March 2014 10:02 CET | Original file | https://www.mdpi.com/1999-4915/6/2/893/xml |
| article pdf uploaded. | 18 February 2014 10:25 CET | Version of Record | https://www.mdpi.com/1999-4915/6/2/893/pdf |
