| article html file updated | 6 February 2020 11:38 CET | Update | https://www.mdpi.com/1999-4923/6/3/481 |
| article html file updated | 7 May 2019 09:24 CEST | Update | - |
| article html file updated | 21 March 2019 23:28 CET | Update | - |
| article html file updated | 20 August 2015 16:03 CEST | Update | - |
| article html file updated | 9 October 2014 11:24 CEST | Original file | - |
| article xml file uploaded | 9 October 2014 11:24 CEST | Original file | https://www.mdpi.com/1999-4923/6/3/481/xml |
| article pdf uploaded. | 20 August 2014 14:02 CEST | Version of Record | https://www.mdpi.com/1999-4923/6/3/481/pdf |
