| article html file updated | 6 February 2020 01:19 CET | Update | https://www.mdpi.com/2071-1050/5/4/1480 |
| article html file updated | 8 May 2019 06:41 CEST | Update | - |
| article html file updated | 20 March 2019 20:32 CET | Update | - |
| article html file updated | 17 June 2015 08:08 CEST | Original file | - |
| article pdf uploaded. | 4 April 2013 10:24 CEST | Updated version of record | https://www.mdpi.com/2071-1050/5/4/1480/pdf |
| article pdf uploaded. | 2 April 2013 14:14 CEST | Version of Record | https://www.mdpi.com/2071-1050/5/4/1480/pdf-vor |
