| article html file updated | 6 February 2020 00:20 CET | Update | https://www.mdpi.com/1999-4915/5/2/528 |
| article html file updated | 8 May 2019 08:58 CEST | Update | - |
| article html file updated | 20 March 2019 18:05 CET | Update | - |
| article html file updated | 17 June 2015 06:05 CEST | Update | - |
| article html file updated | 8 February 2013 09:48 CET | Original file | - |
| article pdf uploaded. | 31 January 2013 14:07 CET | Version of Record | https://www.mdpi.com/1999-4915/5/2/528/pdf |
