| article html file updated | 6 February 2020 06:57 CET | Update | https://www.mdpi.com/2071-1050/6/2/545 |
| article html file updated | 7 May 2019 19:21 CEST | Update | - |
| article html file updated | 21 March 2019 11:35 CET | Update | - |
| article html file updated | 19 August 2015 18:44 CEST | Original file | - |
| article pdf uploaded. | 7 February 2014 15:42 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/2/545/pdf |
| article pdf uploaded. | 29 January 2014 10:46 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/2/545/pdf-vor |
| article pdf uploaded. | 27 January 2014 11:17 CET | Version of Record | https://www.mdpi.com/2071-1050/6/2/545/pdf-vor |
