| article html file updated | 6 February 2020 00:19 CET | Update | https://www.mdpi.com/1424-2818/5/1/26 |
| article html file updated | 8 May 2019 09:02 CEST | Update | - |
| article html file updated | 20 March 2019 18:01 CET | Update | - |
| article html file updated | 17 June 2015 06:01 CEST | Update | - |
| article html file updated | 8 February 2013 09:46 CET | Original file | - |
| article pdf uploaded. | 5 February 2013 16:15 CET | Updated version of record | https://www.mdpi.com/1424-2818/5/1/26/pdf |
| article pdf uploaded. | 4 February 2013 15:13 CET | Updated version of record | https://www.mdpi.com/1424-2818/5/1/26/pdf-vor |
| article pdf uploaded. | 31 January 2013 09:23 CET | Version of Record | https://www.mdpi.com/1424-2818/5/1/26/pdf-vor |
