| article html file updated | 5 February 2020 14:45 CET | Update | https://www.mdpi.com/1424-8247/3/6/1887 |
| article html file updated | 9 May 2019 05:52 CEST | Update | - |
| article html file updated | 20 March 2019 01:00 CET | Update | - |
| article html file updated | 16 June 2015 10:11 CEST | Update | - |
| article html file updated | 5 June 2014 09:06 CEST | Original file | - |
| article xml file uploaded | 5 June 2014 09:06 CEST | Original file | https://www.mdpi.com/1424-8247/3/6/1887/xml |
