| article html file updated | 6 February 2020 07:06 CET | Update | https://www.mdpi.com/2071-1050/6/2/692 |
| article html file updated | 7 May 2019 18:57 CEST | Update | - |
| article html file updated | 21 March 2019 11:59 CET | Update | - |
| article html file updated | 19 August 2015 19:35 CEST | Update | - |
| article html file updated | 24 June 2014 12:25 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:25 CEST | Original file | https://www.mdpi.com/2071-1050/6/2/692/xml |
| article pdf uploaded. | 6 February 2014 08:41 CET | Updated version of record | https://www.mdpi.com/2071-1050/6/2/692/pdf |
| article pdf uploaded. | 5 February 2014 08:48 CET | Version of Record | https://www.mdpi.com/2071-1050/6/2/692/pdf-vor |
