| article html file updated | 8 February 2020 08:27 CET | Update | https://www.mdpi.com/1999-5903/9/2/22 |
| article html file updated | 25 September 2019 09:19 CEST | Update | - |
| article html file updated | 3 May 2019 17:09 CEST | Update | - |
| article html file updated | 30 June 2017 22:45 CEST | Update | - |
| article html file updated | 16 June 2017 11:03 CEST | Original file | - |
| article xml uploaded. | 16 June 2017 11:02 CEST | Original file | https://www.mdpi.com/1999-5903/9/2/22/xml |
| article pdf uploaded. | 16 June 2017 11:02 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/2/22/pdf |
