| article html file updated | 6 February 2020 08:29 CET | Update | https://www.mdpi.com/2079-7737/3/2/281 |
| article html file updated | 7 May 2019 16:07 CEST | Update | - |
| article html file updated | 21 March 2019 15:16 CET | Update | - |
| article html file updated | 20 August 2015 02:43 CEST | Update | - |
| article html file updated | 8 July 2014 09:51 CEST | Update | - |
| article xml file uploaded | 8 July 2014 09:51 CEST | Update | https://www.mdpi.com/2079-7737/3/2/281/xml |
| article html file updated | 24 June 2014 12:02 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:02 CEST | Original file | - |
| article pdf uploaded. | 10 April 2014 09:28 CEST | Version of Record | https://www.mdpi.com/2079-7737/3/2/281/pdf |
