| article html file updated | 8 February 2020 18:13 CET | Update | https://www.mdpi.com/1999-4923/9/4/44 |
| article html file updated | 27 September 2019 16:47 CEST | Update | N/A |
| article html file updated | 2 May 2019 21:50 CEST | Update | N/A |
| article html file updated | 2 January 2018 20:40 CET | Update | N/A |
| article html file updated | 12 October 2017 11:09 CEST | Original file | N/A |
| article xml uploaded. | 12 October 2017 11:08 CEST | Original file | https://www.mdpi.com/1999-4923/9/4/44/xml |
| article pdf uploaded. | 12 October 2017 11:08 CEST | Version of Record | https://www.mdpi.com/1999-4923/9/4/44/pdf |
