| article html file updated | 6 February 2020 06:19 CET | Update | https://www.mdpi.com/2072-4292/6/1/20 |
| article html file updated | 7 May 2019 20:38 CEST | Update | - |
| article html file updated | 21 March 2019 09:46 CET | Update | - |
| article html file updated | 19 August 2015 14:21 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Update | https://www.mdpi.com/2072-4292/6/1/20/xml |
| article html file updated | 6 February 2014 08:41 CET | Original file | - |
| article xml file uploaded | 6 February 2014 08:40 CET | Original file | - |
| article pdf uploaded. | 19 December 2013 12:28 CET | Version of Record | https://www.mdpi.com/2072-4292/6/1/20/pdf |
