| article html file updated | 6 February 2020 08:04 CET | Update | https://www.mdpi.com/1999-4923/6/1/175 |
| article html file updated | 7 May 2019 16:59 CEST | Update | - |
| article html file updated | 21 March 2019 14:17 CET | Update | - |
| article html file updated | 20 August 2015 00:37 CEST | Update | - |
| article html file updated | 28 April 2014 11:08 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 11:08 CEST | Original file | https://www.mdpi.com/1999-4923/6/1/175/xml |
| article pdf uploaded. | 21 March 2014 14:07 CET | Version of Record | https://www.mdpi.com/1999-4923/6/1/175/pdf |
