| article html file updated | 6 February 2020 06:43 CET | Update | https://www.mdpi.com/1999-4915/6/1/201 |
| article html file updated | 7 May 2019 19:49 CEST | Update | - |
| article html file updated | 21 March 2019 11:00 CET | Update | - |
| article html file updated | 19 August 2015 17:18 CEST | Update | - |
| article html file updated | 17 February 2014 12:48 CET | Original file | - |
| article xml file uploaded | 17 February 2014 12:48 CET | Original file | https://www.mdpi.com/1999-4915/6/1/201/xml |
| article pdf uploaded. | 14 January 2014 09:28 CET | Version of Record | https://www.mdpi.com/1999-4915/6/1/201/pdf |
