| article html file updated | 8 February 2020 17:42 CET | Update | https://www.mdpi.com/1999-5903/9/4/60 |
| article html file updated | 27 September 2019 12:37 CEST | Update | - |
| article html file updated | 2 May 2019 22:55 CEST | Update | - |
| article html file updated | 2 January 2018 11:16 CET | Update | - |
| article html file updated | 9 October 2017 11:28 CEST | Update | - |
| article xml uploaded. | 9 October 2017 11:27 CEST | Update | https://www.mdpi.com/1999-5903/9/4/60/xml |
| article pdf uploaded. | 9 October 2017 11:27 CEST | Updated version of record | https://www.mdpi.com/1999-5903/9/4/60/pdf |
| article html file updated | 2 October 2017 14:11 CEST | Original file | - |
| article xml uploaded. | 2 October 2017 14:10 CEST | Original file | - |
| article pdf uploaded. | 2 October 2017 14:10 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/4/60/pdf-vor |
