| article html file updated | 6 February 2020 19:16 CET | Update | https://www.mdpi.com/2072-6651/7/6/2006 |
| article html file updated | 6 May 2019 18:39 CEST | Update | - |
| article html file updated | 26 March 2019 03:56 CET | Update | - |
| article html file updated | 21 August 2015 12:56 CEST | Update | - |
| article html file updated | 2 July 2015 10:14 CEST | Original file | - |
| article xml file uploaded | 2 July 2015 10:14 CEST | Original file | https://www.mdpi.com/2072-6651/7/6/2006/xml |
| article pdf uploaded. | 2 June 2015 10:49 CEST | Version of Record | https://www.mdpi.com/2072-6651/7/6/2006/pdf |
