| article html file updated | 7 February 2020 16:02 CET | Update | https://www.mdpi.com/1999-4923/8/4/30 |
| article html file updated | 22 September 2019 02:20 CEST | Update | - |
| article html file updated | 5 May 2019 02:14 CEST | Update | - |
| article html file updated | 29 December 2016 11:52 CET | Update | - |
| article html file updated | 8 October 2016 11:14 CEST | Original file | - |
| article xml uploaded. | 8 October 2016 11:13 CEST | Update | https://www.mdpi.com/1999-4923/8/4/30/xml |
| article xml uploaded. | 8 October 2016 11:13 CEST | Original file | - |
| article pdf uploaded. | 8 October 2016 11:13 CEST | Version of Record | https://www.mdpi.com/1999-4923/8/4/30/pdf |
