| article html file updated | 8 February 2020 20:47 CET | Update | https://www.mdpi.com/1999-5903/9/4/80 |
| article html file updated | 28 September 2019 08:54 CEST | Update | - |
| article html file updated | 2 May 2019 15:53 CEST | Update | - |
| article html file updated | 2 January 2018 11:19 CET | Update | - |
| article html file updated | 9 November 2017 15:45 CET | Original file | - |
| article xml uploaded. | 9 November 2017 15:43 CET | Update | https://www.mdpi.com/1999-5903/9/4/80/xml |
| article xml uploaded. | 9 November 2017 15:43 CET | Original file | - |
| article pdf uploaded. | 9 November 2017 15:43 CET | Version of Record | https://www.mdpi.com/1999-5903/9/4/80/pdf |
