| article html file updated | 6 February 2020 10:54 CET | Update | https://www.mdpi.com/2071-1050/6/7/4580 |
| article html file updated | 20 September 2019 10:44 CEST | Update | N/A |
| article html file updated | 7 May 2019 11:14 CEST | Update | N/A |
| article html file updated | 21 March 2019 21:26 CET | Update | N/A |
| article html file updated | 20 August 2015 13:24 CEST | Original file | N/A |
| article pdf uploaded. | 22 July 2014 11:34 CEST | Version of Record | https://www.mdpi.com/2071-1050/6/7/4580/pdf |
