| article html file updated | 6 February 2020 04:11 CET | Update | https://www.mdpi.com/2071-1050/5/9/3744 |
| article html file updated | 8 May 2019 00:51 CEST | Update | - |
| article html file updated | 21 March 2019 04:07 CET | Update | - |
| article html file updated | 17 June 2015 12:54 CEST | Original file | - |
| article pdf uploaded. | 5 September 2013 14:17 CEST | Updated version of record | https://www.mdpi.com/2071-1050/5/9/3744/pdf |
| article pdf uploaded. | 4 September 2013 14:43 CEST | Version of Record | https://www.mdpi.com/2071-1050/5/9/3744/pdf-vor |
