| article html file updated | 6 February 2020 06:25 CET | Update | https://www.mdpi.com/2072-6651/6/1/66 |
| article html file updated | 7 May 2019 20:27 CEST | Update | - |
| article html file updated | 21 March 2019 10:04 CET | Update | - |
| article html file updated | 19 August 2015 15:03 CEST | Update | - |
| article html file updated | 17 February 2014 12:37 CET | Original file | - |
| article xml file uploaded | 17 February 2014 12:37 CET | Original file | https://www.mdpi.com/2072-6651/6/1/66/xml |
| article pdf uploaded. | 24 December 2013 13:48 CET | Version of Record | https://www.mdpi.com/2072-6651/6/1/66/pdf |
