| article html file updated | 8 February 2020 18:24 CET | Update | https://www.mdpi.com/1999-5903/9/4/62 |
| article html file updated | 2 May 2019 21:24 CEST | Update | - |
| article html file updated | 2 January 2018 11:17 CET | Update | - |
| article html file updated | 16 October 2017 13:38 CEST | Original file | - |
| article xml uploaded. | 16 October 2017 13:37 CEST | Original file | https://www.mdpi.com/1999-5903/9/4/62/xml |
| article pdf uploaded. | 16 October 2017 13:37 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/4/62/pdf |
| article pdf uploaded. | 13 October 2017 16:12 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/4/62/pdf-vor |
