| article html file updated | 6 February 2020 22:52 CET | Update | https://www.mdpi.com/2076-0760/4/3/742 |
| article html file updated | 21 September 2019 03:30 CEST | Update | - |
| article html file updated | 6 May 2019 11:12 CEST | Update | - |
| article html file updated | 26 March 2019 10:52 CET | Original file | - |
| article pdf uploaded. | 17 September 2015 09:02 CEST | Version of Record | https://www.mdpi.com/2076-0760/4/3/742/pdf |
