| article html file updated | 6 February 2020 12:04 CET | Update | https://www.mdpi.com/2071-1050/6/9/6070 |
| article html file updated | 7 May 2019 08:37 CEST | Update | - |
| article html file updated | 22 March 2019 00:28 CET | Update | - |
| article html file updated | 20 August 2015 17:46 CEST | Update | - |
| article html file updated | 24 September 2014 14:20 CEST | Original file | - |
| article xml file uploaded | 24 September 2014 14:20 CEST | Original file | https://www.mdpi.com/2071-1050/6/9/6070/xml |
| article pdf uploaded. | 10 September 2014 15:09 CEST | Updated version of record | https://www.mdpi.com/2071-1050/6/9/6070/pdf |
| article pdf uploaded. | 9 September 2014 08:08 CEST | Version of Record | https://www.mdpi.com/2071-1050/6/9/6070/pdf-vor |
