| article html file updated | 8 February 2020 03:49 CET | Update | https://www.mdpi.com/1999-4923/9/2/15 |
| article html file updated | 24 September 2019 09:09 CEST | Update | - |
| article html file updated | 4 May 2019 01:46 CEST | Update | - |
| article html file updated | 29 June 2017 12:44 CEST | Update | - |
| article html file updated | 18 April 2017 14:26 CEST | Original file | - |
| article xml uploaded. | 18 April 2017 14:25 CEST | Original file | https://www.mdpi.com/1999-4923/9/2/15/xml |
| article pdf uploaded. | 18 April 2017 14:25 CEST | Version of Record | https://www.mdpi.com/1999-4923/9/2/15/pdf |
