| article html file updated | 6 February 2020 15:03 CET | Update | https://www.mdpi.com/1999-5903/7/1/24 |
| article html file updated | 7 May 2019 02:44 CEST | Update | - |
| article html file updated | 25 March 2019 20:16 CET | Update | - |
| article html file updated | 21 August 2015 05:30 CEST | Update | - |
| article html file updated | 20 January 2015 08:37 CET | Original file | - |
| article xml file uploaded | 20 January 2015 08:37 CET | Original file | https://www.mdpi.com/1999-5903/7/1/24/xml |
| article pdf uploaded. | 9 January 2015 09:55 CET | Version of Record | https://www.mdpi.com/1999-5903/7/1/24/pdf |
