| article html file updated | 6 February 2020 07:06 CET | Update | https://www.mdpi.com/2071-1050/6/2/652 |
| article html file updated | 7 May 2019 18:58 CEST | Update | N/A |
| article html file updated | 21 March 2019 11:58 CET | Update | N/A |
| article html file updated | 19 August 2015 19:34 CEST | Update | N/A |
| article html file updated | 24 June 2014 12:24 CEST | Original file | N/A |
| article xml file uploaded | 24 June 2014 12:24 CEST | Original file | https://www.mdpi.com/2071-1050/6/2/652/xml |
| article pdf uploaded. | 4 February 2014 09:02 CET | Version of Record | https://www.mdpi.com/2071-1050/6/2/652/pdf |
