| article html file updated | 6 February 2020 04:41 CET | Update | https://www.mdpi.com/1424-2818/5/4/734 |
| article html file updated | 7 May 2019 23:46 CEST | Update | - |
| article html file updated | 21 March 2019 05:23 CET | Update | - |
| article html file updated | 17 June 2015 13:36 CEST | Update | - |
| article html file updated | 24 June 2014 12:07 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:07 CEST | Original file | https://www.mdpi.com/1424-2818/5/4/734/xml |
| article pdf uploaded. | 15 October 2013 17:25 CEST | Updated version of record | https://www.mdpi.com/1424-2818/5/4/734/pdf |
| article pdf uploaded. | 30 September 2013 18:09 CEST | Version of Record | https://www.mdpi.com/1424-2818/5/4/734/pdf-vor |
