| article html file updated | 6 February 2020 13:09 CET | Update | https://www.mdpi.com/2071-1050/6/11/7541 |
| article html file updated | 7 May 2019 06:28 CEST | Update | N/A |
| article html file updated | 25 March 2019 16:37 CET | Update | N/A |
| article html file updated | 21 August 2015 00:30 CEST | Original file | N/A |
| article pdf uploaded. | 21 November 2014 08:06 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/11/7541/pdf |
| article pdf uploaded. | 27 October 2014 12:59 CET | Version of Record | https://www.mdpi.com/2071-1050/6/11/7541/pdf-vor |
