| article html file updated | 5 February 2020 22:36 CET | Update | https://www.mdpi.com/2075-1729/2/4/286 |
| article html file updated | 8 May 2019 13:14 CEST | Update | - |
| article html file updated | 20 March 2019 14:07 CET | Update | - |
| article html file updated | 17 June 2015 03:22 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Update | https://www.mdpi.com/2075-1729/2/4/286/xml |
| article html file updated | 24 July 2014 10:31 CEST | Update | - |
| article xml file uploaded | 24 July 2014 10:31 CEST | Original file | - |
| article html file updated | 7 February 2013 16:08 CET | Update | - |
| article html file updated | 24 January 2013 06:23 CET | Original file | - |
