| article html file updated | 19 August 2015 14:18 CEST | Update | https://www.mdpi.com/1424-8220/14/1/68 |
| article html file updated | 20 February 2014 08:52 CET | Original file | - |
| article xml file uploaded | 20 February 2014 08:52 CET | Original file | https://www.mdpi.com/1424-8220/14/1/68/xml |
| article pdf uploaded. | 19 December 2013 12:14 CET | Version of Record | https://www.mdpi.com/1424-8220/14/1/68/pdf |
