| article html file updated | 6 February 2020 17:01 CET | Update | https://www.mdpi.com/2071-1050/7/4/3571 |
| article html file updated | 20 September 2019 19:19 CEST | Update | - |
| article html file updated | 6 May 2019 23:03 CEST | Update | - |
| article html file updated | 25 March 2019 23:38 CET | Update | - |
| article html file updated | 21 August 2015 09:26 CEST | Original file | - |
| article pdf uploaded. | 26 March 2015 14:08 CET | Version of Record | https://www.mdpi.com/2071-1050/7/4/3571/pdf |
