| article html file updated | 6 February 2020 07:50 CET | Update | https://www.mdpi.com/2073-4360/6/3/686 |
| article html file updated | 7 May 2019 17:27 CEST | Update | - |
| article html file updated | 21 March 2019 13:43 CET | Update | - |
| article html file updated | 19 August 2015 23:22 CEST | Original file | - |
| article pdf uploaded. | 11 March 2014 13:59 CET | Version of Record | https://www.mdpi.com/2073-4360/6/3/686/pdf |
