| article html file updated | 6 February 2020 00:10 CET | Update | https://www.mdpi.com/2075-5309/3/1/122 |
| article html file updated | 8 May 2019 09:26 CEST | Update | - |
| article html file updated | 20 March 2019 17:37 CET | Update | - |
| article html file updated | 17 June 2015 05:42 CEST | Update | - |
| article html file updated | 8 February 2013 09:37 CET | Update | - |
| article html file updated | 7 February 2013 17:56 CET | Original file | - |
| article pdf uploaded. | 23 January 2013 08:23 CET | Version of Record | https://www.mdpi.com/2075-5309/3/1/122/pdf |
