| article html file updated | 6 February 2020 08:37 CET | Update | https://www.mdpi.com/2071-1050/6/4/2160 |
| article html file updated | 20 September 2019 07:24 CEST | Update | - |
| article html file updated | 7 May 2019 15:52 CEST | Update | - |
| article html file updated | 21 March 2019 15:32 CET | Update | - |
| article html file updated | 20 August 2015 03:20 CEST | Original file | - |
| article pdf uploaded. | 15 April 2014 13:15 CEST | Version of Record | https://www.mdpi.com/2071-1050/6/4/2160/pdf |
