| article html file updated | 6 February 2020 14:34 CET | Update | https://www.mdpi.com/2071-1050/6/12/9456 |
| article html file updated | 7 May 2019 03:44 CEST | Update | - |
| article html file updated | 25 March 2019 19:29 CET | Update | - |
| article html file updated | 21 August 2015 04:26 CEST | Update | - |
| article html file updated | 26 December 2014 11:32 CET | Original file | - |
| article xml file uploaded | 26 December 2014 11:32 CET | Original file | https://www.mdpi.com/2071-1050/6/12/9456/xml |
| article pdf uploaded. | 22 December 2014 09:22 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/12/9456/pdf |
| article pdf uploaded. | 18 December 2014 13:09 CET | Version of Record | https://www.mdpi.com/2071-1050/6/12/9456/pdf-vor |
