| article html file updated | 6 February 2020 08:44 CET | Update | https://www.mdpi.com/2073-4360/6/4/1232 |
| article html file updated | 7 May 2019 15:37 CEST | Update | N/A |
| article html file updated | 21 March 2019 15:51 CET | Update | N/A |
| article html file updated | 20 August 2015 03:57 CEST | Original file | N/A |
| article pdf uploaded. | 22 April 2014 09:40 CEST | Version of Record | https://www.mdpi.com/2073-4360/6/4/1232/pdf |
