| article html file updated | 7 February 2020 08:28 CET | Update | https://www.mdpi.com/1999-5903/8/2/18 |
| article html file updated | 5 May 2019 16:14 CEST | Update | - |
| article html file updated | 27 March 2019 04:18 CET | Update | - |
| article html file updated | 11 May 2016 10:00 CEST | Original file | - |
| article xml uploaded. | 11 May 2016 09:58 CEST | Original file | https://www.mdpi.com/1999-5903/8/2/18/xml |
| article pdf uploaded. | 11 May 2016 09:58 CEST | Version of Record | https://www.mdpi.com/1999-5903/8/2/18/pdf |
