| article html file updated | 6 February 2020 06:57 CET | Update | https://www.mdpi.com/2071-1050/6/2/571 |
| article html file updated | 7 May 2019 19:21 CEST | Update | - |
| article html file updated | 21 March 2019 11:35 CET | Update | - |
| article html file updated | 19 August 2015 18:44 CEST | Update | - |
| article html file updated | 24 June 2014 12:24 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:24 CEST | Original file | https://www.mdpi.com/2071-1050/6/2/571/xml |
| article pdf uploaded. | 27 January 2014 11:20 CET | Version of Record | https://www.mdpi.com/2071-1050/6/2/571/pdf |
