| article html file updated | 6 February 2020 12:22 CET | Update | https://www.mdpi.com/1999-4893/7/3/471 |
| article html file updated | 20 September 2019 13:06 CEST | Update | - |
| article html file updated | 22 March 2019 01:15 CET | Update | - |
| article html file updated | 11 April 2017 09:54 CEST | Original file | - |
| article pdf uploaded. | 22 September 2014 10:49 CEST | Version of Record | https://www.mdpi.com/1999-4893/7/3/471/pdf |
