| article html file updated | 6 February 2020 17:34 CET | Update | https://www.mdpi.com/2077-1444/6/2/434 |
| article html file updated | 20 September 2019 20:00 CEST | Update | - |
| article html file updated | 6 May 2019 22:07 CEST | Update | - |
| article html file updated | 26 March 2019 00:30 CET | Update | - |
| article html file updated | 21 August 2015 10:20 CEST | Original file | - |
| article pdf uploaded. | 13 April 2015 15:40 CEST | Version of Record | https://www.mdpi.com/2077-1444/6/2/434/pdf |
