| article html file updated | 7 February 2020 07:50 CET | Update | https://www.mdpi.com/1999-5903/8/2/15 |
| article html file updated | 5 May 2019 17:28 CEST | Update | - |
| article html file updated | 27 March 2019 03:05 CET | Update | - |
| article html file updated | 27 April 2016 08:37 CEST | Original file | - |
| article xml uploaded. | 27 April 2016 08:35 CEST | Original file | https://www.mdpi.com/1999-5903/8/2/15/xml |
| article pdf uploaded. | 27 April 2016 08:35 CEST | Version of Record | https://www.mdpi.com/1999-5903/8/2/15/pdf |
