| article html file updated | 8 February 2020 18:39 CET | Update | https://www.mdpi.com/1999-4923/9/4/47 |
| article html file updated | 27 September 2019 19:36 CEST | Update | - |
| article html file updated | 2 May 2019 20:50 CEST | Update | - |
| article html file updated | 2 January 2018 20:41 CET | Update | - |
| article html file updated | 17 October 2017 11:28 CEST | Original file | - |
| article xml uploaded. | 17 October 2017 11:27 CEST | Original file | https://www.mdpi.com/1999-4923/9/4/47/xml |
| article pdf uploaded. | 17 October 2017 11:27 CEST | Version of Record | https://www.mdpi.com/1999-4923/9/4/47/pdf |
