| article html file updated | 6 February 2020 13:17 CET | Update | https://www.mdpi.com/2071-1050/6/11/7621 |
| article html file updated | 7 May 2019 06:13 CEST | Update | - |
| article html file updated | 25 March 2019 16:52 CET | Update | - |
| article html file updated | 21 August 2015 00:53 CEST | Original file | - |
| article pdf uploaded. | 3 November 2014 08:04 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/11/7621/pdf |
| article pdf uploaded. | 31 October 2014 11:46 CET | Version of Record | https://www.mdpi.com/2071-1050/6/11/7621/pdf-vor |
