| article html file updated | 6 February 2020 11:23 CET | Update | https://www.mdpi.com/2071-1050/6/8/5203 |
| article html file updated | 7 May 2019 09:54 CEST | Update | - |
| article html file updated | 21 March 2019 22:53 CET | Update | - |
| article html file updated | 20 August 2015 15:04 CEST | Original file | - |
| article pdf uploaded. | 14 August 2014 13:28 CEST | Updated version of record | https://www.mdpi.com/2071-1050/6/8/5203/pdf |
| article pdf uploaded. | 12 August 2014 12:22 CEST | Version of Record | https://www.mdpi.com/2071-1050/6/8/5203/pdf-vor |
