| article html file updated | 8 February 2020 04:07 CET | Update | https://www.mdpi.com/1999-5903/9/2/15 |
| article html file updated | 24 September 2019 10:53 CEST | Update | - |
| article html file updated | 4 May 2019 01:12 CEST | Update | - |
| article html file updated | 30 June 2017 11:28 CEST | Update | - |
| article html file updated | 21 April 2017 16:21 CEST | Original file | - |
| article xml uploaded. | 21 April 2017 16:19 CEST | Update | https://www.mdpi.com/1999-5903/9/2/15/xml |
| article pdf uploaded. | 21 April 2017 16:19 CEST | Version of Record | https://www.mdpi.com/1999-5903/9/2/15/pdf |
