| article html file updated | 6 February 2020 09:31 CET | Update | https://www.mdpi.com/1424-8247/7/6/634 |
| article html file updated | 7 May 2019 14:02 CEST | Update | - |
| article html file updated | 21 March 2019 17:40 CET | Update | - |
| article html file updated | 20 August 2015 08:19 CEST | Update | - |
| article html file updated | 2 July 2014 12:32 CEST | Original file | - |
| article xml file uploaded | 2 July 2014 12:32 CEST | Original file | https://www.mdpi.com/1424-8247/7/6/634/xml |
| article pdf uploaded. | 26 May 2014 15:55 CEST | Version of Record | https://www.mdpi.com/1424-8247/7/6/634/pdf |
