| article html file updated | 6 February 2020 09:17 CET | Update | https://www.mdpi.com/2073-4352/4/2/104 |
| article html file updated | 7 May 2019 14:29 CEST | Update | N/A |
| article html file updated | 21 March 2019 17:07 CET | Update | N/A |
| article html file updated | 20 August 2015 07:10 CEST | Original file | N/A |
| article pdf uploaded. | 15 May 2014 13:48 CEST | Version of Record | https://www.mdpi.com/2073-4352/4/2/104/pdf |
