| article html file updated | 6 February 2020 04:23 CET | Update | https://www.mdpi.com/2071-1050/5/9/3906 |
| article html file updated | 8 May 2019 00:27 CEST | Update | - |
| article html file updated | 21 March 2019 04:34 CET | Update | - |
| article html file updated | 17 June 2015 13:15 CEST | Update | - |
| article html file updated | 14 November 2014 11:02 CET | Original file | - |
| article xml file uploaded | 14 November 2014 11:02 CET | Original file | https://www.mdpi.com/2071-1050/5/9/3906/xml |
| article pdf uploaded. | 16 September 2013 12:14 CEST | Version of Record | https://www.mdpi.com/2071-1050/5/9/3906/pdf |
