| article html file updated | 6 February 2020 21:48 CET | Update | https://www.mdpi.com/2076-0760/4/3/612 |
| article html file updated | 21 September 2019 01:58 CEST | Update | - |
| article html file updated | 6 May 2019 13:25 CEST | Update | - |
| article html file updated | 26 March 2019 08:50 CET | Original file | - |
| article pdf uploaded. | 17 August 2015 17:17 CEST | Version of Record | https://www.mdpi.com/2076-0760/4/3/612/pdf |
