| article html file updated | 8 February 2020 04:00 CET | Update | https://www.mdpi.com/1999-4915/9/4/84 |
| article html file updated | 24 September 2019 10:15 CEST | Update | - |
| article html file updated | 4 May 2019 01:25 CEST | Update | - |
| article html file updated | 29 April 2017 05:54 CEST | Update | - |
| article html file updated | 20 April 2017 14:19 CEST | Original file | - |
| article xml uploaded. | 20 April 2017 14:18 CEST | Original file | https://www.mdpi.com/1999-4915/9/4/84/xml |
| article pdf uploaded. | 20 April 2017 14:18 CEST | Version of Record | https://www.mdpi.com/1999-4915/9/4/84/pdf |
