| article html file updated | 6 February 2020 07:09 CET | Update | https://www.mdpi.com/2071-1050/6/2/758 |
| article html file updated | 7 May 2019 18:52 CEST | Update | - |
| article html file updated | 21 March 2019 12:05 CET | Update | - |
| article html file updated | 19 August 2015 19:47 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/2071-1050/6/2/758/xml |
| article pdf uploaded. | 10 February 2014 09:12 CET | Version of Record | https://www.mdpi.com/2071-1050/6/2/758/pdf |
