| article html file updated | 6 February 2020 19:50 CET | Update | https://www.mdpi.com/2071-1050/7/6/7806 |
| article html file updated | 20 September 2019 23:01 CEST | Update | - |
| article html file updated | 6 May 2019 17:28 CEST | Update | - |
| article html file updated | 26 March 2019 05:01 CET | Update | - |
| article html file updated | 21 August 2015 13:49 CEST | Original file | - |
| article pdf uploaded. | 18 June 2015 11:48 CEST | Version of Record | https://www.mdpi.com/2071-1050/7/6/7806/pdf |
