| article html file updated | 6 February 2020 10:07 CET | Update | https://www.mdpi.com/1999-4923/6/2/333 |
| article html file updated | 7 May 2019 12:47 CEST | Update | - |
| article html file updated | 21 March 2019 19:18 CET | Update | - |
| article html file updated | 20 August 2015 10:32 CEST | Update | - |
| article html file updated | 8 July 2014 10:36 CEST | Update | - |
| article xml file uploaded | 8 July 2014 10:36 CEST | Update | https://www.mdpi.com/1999-4923/6/2/333/xml |
| article html file updated | 8 July 2014 03:49 CEST | Original file | - |
| article xml file uploaded | 8 July 2014 03:49 CEST | Original file | - |
| article pdf uploaded. | 20 June 2014 12:03 CEST | Version of Record | https://www.mdpi.com/1999-4923/6/2/333/pdf |
