| article html file updated | 6 February 2020 04:02 CET | Update | https://www.mdpi.com/1999-5903/5/3/439 |
| article html file updated | 8 May 2019 01:10 CEST | Update | - |
| article html file updated | 21 March 2019 03:43 CET | Update | - |
| article html file updated | 21 July 2017 04:02 CEST | Update | - |
| article html file updated | 21 July 2017 04:02 CEST | Update | - |
| article html file updated | 21 July 2017 04:01 CEST | Original file | - |
| article xml uploaded. | 21 July 2017 04:00 CEST | Original file | https://www.mdpi.com/1999-5903/5/3/439/xml |
| article pdf uploaded. | 28 August 2013 10:45 CEST | Version of Record | https://www.mdpi.com/1999-5903/5/3/439/pdf |
