| article html file updated | 6 February 2020 16:55 CET | Update | https://www.mdpi.com/2071-1050/7/4/3515 |
| article html file updated | 6 May 2019 23:13 CEST | Update | - |
| article html file updated | 25 March 2019 23:28 CET | Update | - |
| article html file updated | 21 August 2015 09:14 CEST | Original file | - |
| article pdf uploaded. | 24 March 2015 13:56 CET | Version of Record | https://www.mdpi.com/2071-1050/7/4/3515/pdf |
