| article html file updated | 6 February 2020 02:44 CET | Update | https://www.mdpi.com/2071-1050/5/6/2727 |
| article html file updated | 8 May 2019 03:50 CEST | Update | - |
| article html file updated | 21 March 2019 00:03 CET | Update | - |
| article html file updated | 17 June 2015 10:25 CEST | Original file | - |
| article pdf uploaded. | 24 June 2013 10:42 CEST | Updated version of record | https://www.mdpi.com/2071-1050/5/6/2727/pdf |
| article pdf uploaded. | 20 June 2013 10:49 CEST | Version of Record | https://www.mdpi.com/2071-1050/5/6/2727/pdf-vor |
