| article html file updated | 8 February 2020 07:14 CET | Update | https://www.mdpi.com/1999-5903/9/2/19 |
| article html file updated | 25 September 2019 03:02 CEST | Update | - |
| article html file updated | 3 May 2019 19:26 CEST | Update | - |
| article html file updated | 30 June 2017 11:28 CEST | Update | - |
| article html file updated | 1 June 2017 14:29 CEST | Original file | - |
| article xml uploaded. | 1 June 2017 14:28 CEST | Original file | https://www.mdpi.com/1999-5903/9/2/19/xml |
| article pdf uploaded. | 1 June 2017 14:28 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/2/19/pdf |
