| article html file updated | 6 February 2020 05:21 CET | Update | https://www.mdpi.com/2072-6694/5/4/1439 |
| article html file updated | 7 May 2019 22:30 CEST | Update | - |
| article html file updated | 21 March 2019 07:08 CET | Update | - |
| article html file updated | 6 January 2014 11:09 CET | Original file | - |
| article xml file uploaded | 6 January 2014 11:09 CET | Original file | https://www.mdpi.com/2072-6694/5/4/1439/xml |
| article pdf uploaded. | 5 November 2013 10:46 CET | Version of Record | https://www.mdpi.com/2072-6694/5/4/1439/pdf |
