| article html file updated | 6 February 2020 05:27 CET | Update | https://www.mdpi.com/1424-8247/6/11/1429 |
| article html file updated | 7 May 2019 22:19 CEST | Update | N/A |
| article html file updated | 21 March 2019 07:23 CET | Update | N/A |
| article html file updated | 19 August 2015 09:16 CEST | Update | N/A |
| article html file updated | 3 December 2013 08:20 CET | Original file | N/A |
| article xml file uploaded | 3 December 2013 08:20 CET | Original file | https://www.mdpi.com/1424-8247/6/11/1429/xml |
| article pdf uploaded. | 13 November 2013 16:41 CET | Updated version of record | https://www.mdpi.com/1424-8247/6/11/1429/pdf |
| article pdf uploaded. | 11 November 2013 09:46 CET | Version of Record | https://www.mdpi.com/1424-8247/6/11/1429/pdf-vor |
