| article html file updated | 7 February 2020 08:26 CET | Update | https://www.mdpi.com/1999-5903/8/2/17 |
| article html file updated | 5 May 2019 16:19 CEST | Update | N/A |
| article html file updated | 27 March 2019 04:12 CET | Update | N/A |
| article html file updated | 10 May 2016 14:58 CEST | Original file | N/A |
| article xml uploaded. | 10 May 2016 14:57 CEST | Original file | https://www.mdpi.com/1999-5903/8/2/17/xml |
| article pdf uploaded. | 10 May 2016 14:57 CEST | Version of Record | https://www.mdpi.com/1999-5903/8/2/17/pdf |
