| article html file updated | 6 February 2020 08:39 CET | Update | https://www.mdpi.com/2079-7737/3/2/320 |
| article html file updated | 7 May 2019 15:46 CEST | Update | - |
| article html file updated | 21 March 2019 15:39 CET | Update | - |
| article html file updated | 20 August 2015 03:30 CEST | Update | - |
| article html file updated | 8 July 2014 09:51 CEST | Original file | - |
| article xml file uploaded | 8 July 2014 09:51 CEST | Original file | https://www.mdpi.com/2079-7737/3/2/320/xml |
| article pdf uploaded. | 16 April 2014 13:39 CEST | Version of Record | https://www.mdpi.com/2079-7737/3/2/320/pdf |
