| article html file updated | 6 February 2020 00:19 CET | Update | https://www.mdpi.com/2071-1050/5/2/440 |
| article html file updated | 8 May 2019 09:01 CEST | Update | - |
| article html file updated | 20 March 2019 18:03 CET | Update | - |
| article html file updated | 17 June 2015 06:02 CEST | Update | - |
| article html file updated | 25 February 2013 08:55 CET | Update | - |
| article xml uploaded. | 25 February 2013 08:55 CET | Original file | https://www.mdpi.com/2071-1050/5/2/440/xml |
| article html file updated | 8 February 2013 09:46 CET | Original file | - |
| article pdf uploaded. | 31 January 2013 10:29 CET | Version of Record | https://www.mdpi.com/2071-1050/5/2/440/pdf |
