| article html file updated | 8 February 2020 22:15 CET | Update | https://www.mdpi.com/1999-5903/9/4/91 |
| article html file updated | 28 September 2019 18:17 CEST | Update | - |
| article html file updated | 2 May 2019 12:40 CEST | Update | - |
| article html file updated | 18 April 2019 10:17 CEST | Update | - |
| article html file updated | 2 January 2018 11:21 CET | Update | - |
| article html file updated | 27 November 2017 03:28 CET | Original file | - |
| article xml uploaded. | 27 November 2017 03:27 CET | Update | https://www.mdpi.com/1999-5903/9/4/91/xml |
| article xml uploaded. | 27 November 2017 03:27 CET | Original file | - |
| article pdf uploaded. | 27 November 2017 03:27 CET | Updated version of record | https://www.mdpi.com/1999-5903/9/4/91/pdf |
| article pdf uploaded. | 25 November 2017 11:55 CET | Version of Record | https://www.mdpi.com/1999-5903/9/4/91/pdf-vor |
