| article html file updated | 8 February 2020 10:31 CET | Update | https://www.mdpi.com/1999-5903/9/3/31 |
| article html file updated | 25 September 2019 20:07 CEST | Update | N/A |
| article html file updated | 3 May 2019 13:18 CEST | Update | N/A |
| article html file updated | 30 September 2017 13:59 CEST | Update | N/A |
| article html file updated | 8 July 2017 11:27 CEST | Original file | N/A |
| article xml uploaded. | 8 July 2017 11:26 CEST | Original file | https://www.mdpi.com/1999-5903/9/3/31/xml |
| article pdf uploaded. | 8 July 2017 11:26 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/3/31/pdf |
