| article html file updated | 7 February 2020 17:48 CET | Update | https://www.mdpi.com/1999-5903/8/4/54 |
| article html file updated | 4 May 2019 22:55 CEST | Update | N/A |
| article html file updated | 10 November 2016 10:00 CET | Original file | N/A |
| article xml uploaded. | 10 November 2016 09:59 CET | Original file | https://www.mdpi.com/1999-5903/8/4/54/xml |
| article pdf uploaded. | 10 November 2016 09:59 CET | Version of Record | https://www.mdpi.com/1999-5903/8/4/54/pdf |
