| article html file updated | 5 February 2020 23:05 CET | Update | https://www.mdpi.com/2075-4426/2/4/257 |
| article html file updated | 8 May 2019 11:54 CEST | Update | - |
| article html file updated | 20 March 2019 15:12 CET | Update | - |
| article html file updated | 17 June 2015 04:12 CEST | Update | - |
| article html file updated | 21 July 2014 03:39 CEST | Update | - |
| article xml file uploaded | 21 July 2014 03:39 CEST | Original file | https://www.mdpi.com/2075-4426/2/4/257/xml |
| article html file updated | 7 February 2013 16:54 CET | Update | - |
| article html file updated | 24 January 2013 09:13 CET | Original file | - |
