| article html file updated | 6 February 2020 06:34 CET | Update | https://www.mdpi.com/1424-2818/6/1/33 |
| article html file updated | 7 May 2019 20:09 CEST | Update | - |
| article html file updated | 21 March 2019 10:33 CET | Update | - |
| article html file updated | 19 August 2015 16:30 CEST | Update | - |
| article html file updated | 20 October 2014 11:29 CEST | Update | - |
| article xml file uploaded | 20 October 2014 11:29 CEST | Update | https://www.mdpi.com/1424-2818/6/1/33/xml |
| article html file updated | 14 October 2014 06:28 CEST | Update | - |
| article xml file uploaded | 14 October 2014 06:28 CEST | Update | - |
| article html file updated | 29 September 2014 11:27 CEST | Original file | - |
| article xml file uploaded | 29 September 2014 11:27 CEST | Original file | - |
| article pdf uploaded. | 6 January 2014 11:19 CET | Updated version of record | https://www.mdpi.com/1424-2818/6/1/33/pdf |
| article pdf uploaded. | 3 January 2014 14:07 CET | Version of Record | https://www.mdpi.com/1424-2818/6/1/33/pdf-vor |
