| article html file updated | 6 February 2020 06:53 CET | Update | https://www.mdpi.com/1999-4915/6/1/336 |
| article html file updated | 7 May 2019 19:29 CEST | Update | - |
| article html file updated | 21 March 2019 11:23 CET | Update | - |
| article html file updated | 19 August 2015 18:24 CEST | Update | - |
| article html file updated | 17 February 2014 12:51 CET | Original file | - |
| article xml file uploaded | 17 February 2014 12:51 CET | Original file | https://www.mdpi.com/1999-4915/6/1/336/xml |
| article pdf uploaded. | 22 January 2014 15:18 CET | Version of Record | https://www.mdpi.com/1999-4915/6/1/336/pdf |
