| article html file updated | 6 February 2020 13:07 CET | Update | https://www.mdpi.com/2073-4360/6/11/2720 |
| article html file updated | 7 May 2019 06:33 CEST | Update | - |
| article html file updated | 25 March 2019 16:31 CET | Update | - |
| article html file updated | 21 August 2015 00:23 CEST | Original file | - |
| article pdf uploaded. | 24 October 2014 16:26 CEST | Updated version of record | https://www.mdpi.com/2073-4360/6/11/2720/pdf |
| article pdf uploaded. | 24 October 2014 16:25 CEST | Version of Record | https://www.mdpi.com/2073-4360/6/11/2720/pdf-vor |
